Intrusion
来自Big Physics
late Middle English (in the sense ‘invasion, usurpation’): from medieval Latin intrusio(n- ), from Latin intrudere ‘thrust in’ (see intrude).
wiktionary
From Old French intrusion, from Medieval Latin intrusio
etymonline
intrusion (n.)
late 14c., "unjust invasion of property or usurpation of office," from Old French intrusion (14c.), from Medieval Latin intrusionem (nominative intrusio) "a thrusting in," noun of action from past participle stem of Latin intrudere "to thrust in, force in," from in- "in" (from PIE root *en "in") + trudere "to thrust, push," from PIE *treud- "to press, push, squeeze" (see threat).
Meaning "a thrusting or pushing in" is from 1590s; that of "act of intruding" is from 1630s. Geological sense is from 1816.
