trud-, -trude, trus-, -trusion

(Latin: thrust, push, shove)

abstrude (verb), abstrudes; abstruded; abstruding
To thrust, to push forcefully, or to pull away: Using the oars, Adam abstruded his boat away from the dock and rowed out onto the lake.
abstruse (adjective); more abstruse, most abstruse
1. Relating to something which is concealed or hidden; complex, obscure, and difficult to understand: The poetry of Harry Philips was often described as abstruse and so it was often relegated to the bottom shelf of many libraries.
2. Pertaining to something difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge: Some scientists may understand Einstein's theory of relativity, however for most nonscientists, it continues to be an abstruse collection of surrealistic or unrealistic ideas.
3. Etymology: from Latin abstrusus, past participle of abstrudere, "conceal"; literally, "to thrust away", from ab-, "away" + trudere "to thrust, to push".
Complex and so very hard to understand.
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Too difficult to know what is being presented.
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Difficult or too complex to comprehend.
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Remote from apprehension.
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abstrusely (adverb); more abstrusely, most abstrusely
1. Pertaining to how something is difficult to understand: Bruce's essay about climate changes was abstrusely difficult to comprehend except by an expert weather specialist.
2. Regarding how something is done in a concealed way: Sally abstrusely designed secret pockets in the jacket she was making so the one who wore it could hide cash and small valuables without anyone else being aware of it.
3. Concerning how a subject matter is difficult to be comprehended or understood, as opposed to what is obvious: Jeremy's theory seems to be that the more abstrusely he writes the more famous he will become.
abstruseness (s) (noun), abstrusenesses (pl)
1. The condition of being inexplicit and hard to perceive; obscureness: The abstruseness of the economist when he was speaking at the forum about the economic situation was confusing his audience.
2. Knowledge that is obscure and little known; a matter that is difficult to understand; profoundity; The university students were confused by the professor's abstrusenesses in some of his lectures about philosophical and religious beliefs and practices.
1. The quality or state of being abstruse.
2. An abstruse statement, action, etc.
autointrusion (aw" toh in TROO zhuhn) (s) (noun), autointrusions (pl)
In geology, a process that takes place when the liquid of a different magma or the melted solid crystals or mantle rocks are drawn into rifts or openings formed at a later stage of volcanic actions: A series of injections or autointrusions of melted fluids of rocks that go into fissures, or narrow cracks or openings, of earlier crystallized minerals.
detrude (verb), detrudes; detruded; detruding
1. To thrust down or out.
2. To push down with force.
detrusion (s) (noun), detrusions (pl)
The act of pushing down or forcing out or away: Because the ground was so hard in the garden, the detrusion of the spade into the soil cost James all of his strength and energy.
extrude (verb), extrudes; extruded; extruding
1. To make something by forcing a semisoft material; such as, plastic or molten metal, through a specially shaped mold or nozzle: The worker had just extruded some more aluminum rods at the metal factory.
2. To force or to squeeze something out: Maggie was extruding tooth paste from the tube on her toothbrush so she could brush her teeth.
3. To thrust out; to force or to press out; to expel: The volcano was extruding molten rock or lava.
4. Etymology: from Latin extrudere."to thrust out"; from ex-, "out" + trudere, "to push out, to force out".
extrusion (ik STROO zhuhn) (s) (noun), extrusions (pl)
1. Squeezing out by applying pressure: There was an unexpected extrusion of toothpaste from the bottom of the tube.

Grace turned a bottle upside down and suddenly an extrusion of ketchup spilled out onto her plate.

2. Something that bulges out, is protuberant, or projects from a form: Little Timmy wondered about the extrusion of his mother’s tummy; so, she told him that she was pregnant and was expecting a baby girl!
3. Something formed by forcing semisoft material through a specially shaped mold or nozzle: An extrusion takes place when a partly finished length of metal is thrust through a die to create a metal object; such as, a rod or a pipe.
4. An igneous rock formed by the emission of molten material or magma through cracks in the earth's surface where it forms a lava flow and solidified igneous rock: At the museum of natural history, the group of students were shown pieces of extrusions which exist in certain outer layers of the earth.
1. Tending to push or thrust out.
2. Tending to protrude or project.
3. Derived from magma poured out or ejected at the earth's surface; a reference to igneous rocks.
4. Noting or pertaining to a class of igneous rocks that have been forced out in a molten or plastic condition upon the surface of the earth.
1. Not conspicuous, blatant, or assertive.
2. Not noticeable; unobtrusive.
intrude (in TROOD) (verb), intrudes; intruded; intruding
1. To put or to force in inappropriately, without an invitation or permission: Jane's friend intruded his opinion about how she should lose weight.
2. To disturb someone's peace or privacy by being annoying: The reporters were constantly intruding into the actors privacy.

While Sam was having his lunch with a friend, the waiter came to his table and said: "Excuse me, sir. I don't mean to intrude, but you have a phone call."

3. To be an unwelcome presence in, or to make an unwelcome entry into, something or a place: The noise of the screaming from the amusement park people down the street intruded on what Judy thought would be a quiet afternoon where she was living.
4. To force molten rock into a pre-existing rock formation: The geologists were observing how the volcano was intruding more lava into areas that were not affected by this before.
5. Etymology: from Latin intrudere, "to thrust oneself in, to come unasked or unwanted; from in-, "in" + trudere, "to thrust, to push".

Although the following illustration is a noun, it provides a good example of this verb entry.

To be an unwelcome presence.
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A female intruder.
intrusion (in TROO zhuhn) (s) (noun), intrusions (pl)
1. A disturbance of someone's peace or privacy by an unwelcome arrival or presence: The ringing of the alarm clock at 6:30 in the morning was an intrusion into Jason's pleasant dream.
2. The action of thrusting in, or of entering into a place or situation without an invitation, a right, or welcome: The birthday party was disturbed by the intrusion of an uninvited guest.
3. An unwelcome presence or effect that agitates, unsettles or upsets something: When Kitty was staying in the hotel that her friends had recommended, she was bothered by the intrusion of the maid who entered her room without knocking.
4. An illegal entry into a place, often by force, in order to commit a crime; When the alleged burglar appeared in court, he was charged with intrusion with the intent to commit a robbery of the elderly couple who lived in the house.
5. A body of melted igneous matter that has moved while in the form of magma into pre-existing rocks with subsequent alterations of those elements: The geologist and students were interested in studying the pattern of intrusions, or flows, of lava into the cracks of earlier volcanic material on the same hillside.

Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; pel-; puls-.