Penetration
来自Big Physics
late Middle English: from Latin penetratio(n- ), from the verb penetrare ‘place within or enter’.
wiktionary
From Middle English penetracioun, from Old French penetracïon, and its source, Latin penetrātiō, from the participle stem of penetrō(“pierce”, verb). Morphologically penetrate + -ion
etymonline
penetration (n.)
early 15c., penetracioun, "a puncture, a penetrating wound," from Latin penetrationem (nominative penetratio) "a penetrating or piercing," noun of action from past-participle stem of penetrare "to put or get into, enter into" (see penetrate). From c. 1600 as "insight, discernment, shrewdness;" the sexual sense is attested from 1610s; meaning "act of penetrating or piercing" is from 1620s; in optics, by 1799.
