An Etymological Dictionary of Astronomy and Astrophysics

A prefix meaning → pressure used in the formation of compound words, such as → baroclinic, → barometer, → barotropic.

Etymology (EN): Baro- combining form of Gk. baros “weight;” cognate with Pers. bâr “weight,” gerân “heavy;” cf. Skt. guru, L. gravis; PIE *gwere- “heavy;”
L. brutus “heavy, dull, stupid, brutish;” Skt. bhara- “burden, load,” bharati “he carries;” PIE *bher- “carry, give birth.”

Etymology (PE): Fešâr-, → pressure.