英语词源字典 - 在线词源网站

exert (v.)[exert 词源字典]: 1660s, "thrust forth, push out," from Latin exertus/exsertus, past participle of exerere/exserere "thrust out, put forth," from ex- "out" (see ex-) + serere "attach, join" (see series). Meaning "put into use" is 1680s. Related: Exerted; exerting.[exert etymology, exert origin, 英语词源]
protrude (v.): 1610s, "to thrust forward or onward, to drive along;" 1640s, "to cause to stick out," from Latin protrudere "thrust forward; push out," from pro- "forward" (see pro-) + trudere "to thrust" (see extrusion). Intransitive meaning "jut out, bulge forth" recorded from 1620s. Related: Protruded; protruding.
protrusion (n.): 1640s, from French protrusion, noun of action from past participle stem of Latin protrudere "to push out" (see protrude), or from a similar formation in English.