assist
v.
early 15c., from Middle French assister "to stand by, help, put, place, assist" (14c.), from Latin assistere "stand by, take a stand near, attend," from ad- "to" (see ad-) + sistere "stand still, take a stand; to set, place, cause to stand," from PIE *si-st-, reduplicated form of root *sta- "to stand" (see stet). Related: Assisted; assisting. Medical assisted suicide attested from 1884.
n.
1570s, "an act of assistance," from assist, v.. In the sporting sense attested 1877 in baseball, 1925 in ice hockey.
〔李〕[as-（ad-）=at 在；sist=to stand 站 ⇒“to stand at one's side 站在某人身边”→] v. help 帮助
〔蒋〕[as-表示at，sist立，’立于一旁”] 帮助，援助，辅助
〔李〕[as-(ad-)=to, at在；sist=to stand站→“to stand at one's side站在某人身边”→] v. help帮助