turb-, turbin-, turbo-, turbu-

(Latin: uproar, commotion, disorderly, agitated, confusion; whirl, whirlwind)

imperturbably (adverb)
imperturbed (adjective)
Noli perturbare.
Do not disturb.
pedoturbation (s) (noun), pedoturbations (pl)
Any of the various processes by which the surface of the soil is disturbed; such as, the burrowing of animals like rabbits, moles, etc.
perturb (verb), perturbs; perturbed; perturbing
1. To disturb or disquiet greatly in mind; to agitate: Mike's parents were perturbed by the low grades he got on his report card in school.
2. To cause someone to be worried or upset: It is perturbing to Andy's mother and father that he is thinking about not going to school anymore.
3. To make uneasy or anxious: Helena's teacher was perturbed by the lack of interest of his students in his chemistry class.
4. Etymology: from Latin perturbare, "to confuse, to disturb"; from a combination of per-, "through" + turbare, "to disturb, to confuse, to throw into disorder."
To greatly upset or to agitate.
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To significantly make uneasy or anxious.
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perturbable (adjective)
1. Characteristic of a great disturbance or to make uneasy or anxious.
2. A description of being in great confusion.
perturbance (s) (noun), perturbances (pl)
Disturbance; perturbation.
perturbation (s) (noun), perturbations (pl)
1. A small change in a physical system, most often in a physical system at equilibrium that is disturbed from the outside.
2. A cause of mental disquiet, disturbance, or agitation.
3. Variation in a designated orbit, as of a planet, that results from the influence of one or more external bodies.

Gravitational attraction between planets can cause perturbations and cause a planet to deviate from its expected orbit.

Perturbations in Neptune's orbit led to the discovery of the object that was causing the perturbation; the planet Pluto.

Perturbations in the orbits of stars have led to the discovery of planetary systems outside of our Solar system.

perturbedly (adverb)
A description of being thrown into great disorder or derangement.
quasi turbine, quasiturbine (s) (noun); quasi turbines, quasiturbines (pl)
The Quasiturbine (Qurbine) is a no crankshaft rotary engine having a four faces articulated rotor with a free and accessible center, rotating without vibration nor dead time, and producing a strong torque at low RPM under a variety of modes and fuels.

The Quasiturbine can also be used as air motor, steam engine, Stirling engine, compressor and pump. The Quasiturbine is also an optimization theory for extremely compact and efficient engine concepts.

The Quasiturbine is at the crossroad of three modern engines: Inspired by the turbine, it perfects the piston, and improves upon the Wankel.

The Quasiturbine is universal in relation to energy sources: Liquid and gaseous fuel, hydrogen, steam, pneumatic, and hydraulic. The Quasiturbine engine was invented by the Saint-Hilaire family and first patented in 1996. The engine makes use of a complex computer calculated oval shape stator housing, creating regions of increasing and decreasing volumes as the rotor turns. It is capable of burning fuel using detonation, the optimal combustion mode of the future which the piston cannot stand.

Suave, mari magno turbantibus aequora ventis, e terra magnum alterius spectare laborem.
It is pleasant when safe on the land to watch the great struggle of another out on a swelling sea, amid winds churning the deep. -Lucretius
tidal turbine (s) (noun), tidal turbines (pl)
Ocean-power technology splits into two broad categories, tidal and wave power.
  1. Wave power involves the use of the up and down motions of the waves to produce electricity.
  2. Tidal power consists of harnessing the action of the tides with underwater turbines, which twirl like wind machines.
  3. A third type of power generation, called ocean thermal, has the objective of exploiting temperature differences between the surface and the deep ocean, and is primarily applicable to tropical areas.
  4. Some experts claim that ocean electrical power has more advantages than wind power because water is about 850 times denser than air, and so it consists of far more energy.
  5. The ocean's waves, tides, and currents are also considered to be more predictable than the wind.
  6. The negative aspect is that seawater can batter and corrode machinery, and costly undersea cables may be needed to bring the electrical power to shore and the machines are considerably more expensive to build.
  7. General Electric, which builds wind turbines, solar panels, and other equipment for virtually every other type of energy, has so far stayed clear of ocean energy because of the much greater costs.
—Based on information from an article titled:
"New push to tap the oceans for electricity" by Kate Galbraith
in The Global Edition of the New York Times; September 24, 2008; page 18.
tourbillon (s) (noun), tourbillons (pl)
1. A whirlwind; something resembling a whirlwind; a vortex, as of a whirlwind or whirlpool.
2. A skyrocket that has a spiral flight.
3. An ornamental firework which turns around, when in the air, so as to form a scroll of fire.
4. Etymology: "whirlwind; firework" with a spiral flight; from French tourbillon, "whirlwind"; from Old French torbeillon, ultimately from Latin turbo-, "whirl, whirlwind"; genitive of turbinis, "whirlwind".
5. In horology, a frame for the escapement (a device which converts continuous rotational motion into an oscillating or back and forth motion) of a timepiece; especially, in an epicycle and assumes all the vertical positions in one or two minutes; therefore, minimizing or neutralizing position errors.

The tourbillon is one of the most valued features of collectors' watches and premium timepieces, possibly for the same reason that mechanical watches obtain a much higher price than similar quartz watches that are much more accurate.

High-quality tourbillon wristwatches, which are usually made by the Swiss luxury watch industry, are very expensive, and typically retail for prices in the tens of thousands of dollars or euros being common; for example, a "Reverso Gyrotourbillon 2" (a spherical tourbillon) watch by Jaeger-LeCoutre sells for about $400,000, or more.

Single and multi-axis tourbillons aim to counter the distorting effect of gravity on a watch by rotating its escapement mechanism on one plane in a single tourbillon or three-dimensionally in a multi-axis complication.

The function of the tourbillon is to make the watch run more consistently; but it does not improve the inherent time-keeping accuracy of the watch.

In fact, as energy is required to rotate the tourbillon cage, most tourbillon mechanisms incorporate small balance wheels to compensate for the energy loss, which is actually detrimental to the precision of the watch.

Etymology: from Anglo-French turbeillun; which came from Latin turbin-, turbo-, "whirl, whirlwind".

— Most of the information presented here was compiled from
"Time pieces that push the limits" by Sonia Kolesnikov-Jessop
as seen in the International Herald Tribune, A Cut above Watches (special section);
November 29-30, 2008; pages I and II.
trouble (s) (noun), troubles (pl)
1. A condition of distress, affliction, difficulty, or need: "He tried to console them in their trouble."
2. A distressing or difficult circumstance or situation: "She has had troubles ever since she took this job."
3. A cause or source of distress, disturbance, or difficulty: "The new students were a trouble to the teacher."
4. A condition of pain, disease, or malfunction: "Her father had both heart trouble and car trouble."
5. Public unrest or disorder; a disturbance.
6. Something that is extremely difficult or which presents a problem.

Origin of the word, "trouble"

When a person is in trouble, his or her mind is ill at ease. The Latin parent of the word trouble indicates the same thing because turbo meant "disturb".

It came into English first with the spelling turble, then truble, and finally trouble. This same Latin word, turbo, has given us turbulent, "full of commotion"; disturb, "throw into complete disorder", and turbid, or in other words, a turbid stream which is "all muddied up."

—Based on information from Funk, Word Origins
troubled (adjective)

Cross references of word groups that are related, directly or indirectly, to: "air, wind": aello-; aeolo-; aero-; anemo-; atmo-; austro-; flat-, flatu-; phys-; pneo-, -pnea; pneumato-; vent-; zephyro-.