react
v.
1640s, "to exert, as a thing acted upon, an opposite action upon the agent," from re- + act, v.. Chemical sense is from 1944. Related: Reacted; reacting (1610s). For sense development, see reaction. Meaning "perform again" (often re-act) is from 1650s.
〔李〕[re-=back回返；act=to do做→] v.① do or act in reply反应