Heard
来自Big Physics
Old English hīeran, hēran, of Germanic origin; related to Dutch hooren and German hören .
wiktionary
Occupational Middle English surname for shepherds or cowherds, from herde, from Old English heord(“herd”).
etymonline
heard
past tense and past participle of hear, Old English herde. To have heard of "know about" is from 1907.
