"perception by ear," early 13c., from present participle of hear. Meaning "a listening to evidence in a court of law" is from 1570s.
Old English heran (Anglian), (ge)hieran, hyran (West Saxon) "to hear, listen (to), obey, follow; accede to, grant; judge," from Proto-Germanic *hauzjan (cf. Old Norse heyra, Old Frisian hora, Dutch horen, German hören, Gothic hausjan), perhaps from PIE *kous- "to hear" (see acoustic). The shift from *-z- to -r- is a regular feature in some Germanic languages.
For spelling, see see head (n.); spelling distinction between hear and here developed 1200-1550. Old English also had the excellent adjective hiersum "ready to hear, obedient," literally "hear-some" with suffix from handsome, etc. Hear, hear! (1680s) was originally imperative, used as an exclamation to call attention to a speaker's words; now a general cheer of approval. Originally it was hear him!
hear (hēr)
v. heard (hûrd), hear·ing, hears
To perceive (sound) by the ear.
hearing n.
The sense by which sound is perceived; the capacity to hear.