obedient (adj.)

c. 1300, obeien, "carry out the commands of (someone); submit to (a command, rule, etc.); be ruled by," from Old French obeir "obey, be obedient, do one's duty" (12c.), from Latin obedire, oboedire "obey, be subject, serve; pay attention to, give ear," literally "listen to," from ob "to" (see ob-) + audire "listen, hear" (from PIE root *au- "to perceive"). Same sense development is in hiersumnian, the Old English word for the same thing. Related: Obeyed; obeying.

Proto-Indo-European root meaning "to perceive."

It forms all or part of: aesthete; aesthetic; anesthesia; audible; audience; audio; audio-; audit; audition; auditor; auditorium; auditory; hyperaesthesia; kinesthetic; oyer; oyez; obedient; obey; paraesthesia; synaesthesia.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit avih, Avestan avish "openly, evidently;" Greek aisthanesthai "to feel;" Latin audire "to hear;" Old Church Slavonic javiti "to reveal."

"in a compliant manner, dutifully," late 14c., from obedient + -ly (2).