baro-, bar-, bary- +

(Greek: weight, heavy; atmospheric pressure; a combining form meaning "pressure", as in barotaxis, or sometimes "weight", as in baromacrometer)

In an extended sense, these elements may mean "difficult" or "slow".

baryglossia (s) (noun), baryglossias (pl)
Indistinct speech due to a disorder of the tongue itself or of the nerves supplying it.
barylalia
Indistinct, slow speech from any cause. The most frequent cause is a lesion in the central nervous system, as in general paresis and senile dementia.
barymorphosis, barymorphic
Those structural changes in organisms that result from the effect of pressure or weight.
baryophobia (s) (noun), baryophobias (pl)
The unreasonable fear of becoming overweight or that one's child will become obese: Because of her baryophobia, Jane was very apprehensive about her daughter Sally getting fat, and so she put her on a diet which turned out to be insufficient to support her growth and development, and therefore she went to the doctor to get advice.
baryphony, baryphonia, baryphonic
1. A Heavy, thick quality of the voice.
2. Difficulty of speech; thick, indistinct speech.
barysphere
1. The internal substance of the earth enclosed by the lithosphere.
2. The central core of the earth.
barythymia
Nervousness, depression.
barytone, baritone
A male singing voice with a range lower than a tenor and higher than a bass, or a singer with this voice level; deep sounding.
centrobaric
A reference to a center of gravity.
eurybaric
1. Applicable to animals adaptable to great differences in altitude.
2. Tolerant of a wide range of atmospheric or hydrostatic pressures.
homobaric
Of uniform (same) weight.
hybaroxia
Oxygen therapy with pressures greater than one atmosphere or ambient oxygen pressure applied to the entire body in a chamber or room.
hypobaropathy
1. Sickness or disturbances experienced in high altitudes due to reduced air pressure; high-altitude sickness.
2. Produced by reduced barometric pressure; not always distinguished from hypobarism and altitude sickness.
isobar
A line drawn on a weather map that connects places with equal atmospheric pressure over a given period or at a given time.

Isobars are often used collectively to indicate the movement or formation of weather systems.

isobaric
Having constant or equal atmospheric pressure; relating to isobars.