Erection

google

ref

late Middle English: from Latin erectio(n- ), from erigere ‘set up’ (see erect).

wiktionary

ref

Borrowed from Latin ērectiō, ērectiōnis, noun of action from perfect passive participle ērectus, from verb erigō, from prefix ē-(“out of”) + regō, + action suffix -iō.

etymonline

ref

erection (n.)

mid-15c., "establishment; advancement," from Late Latin erectionem (nominative erectio), noun of action from past participle stem of erigere "to set up, erect" (see erect (adj.)). Meanings "the putting up" (of a building, etc.), "stiffening of the penis" (also sometimes of the turgidity and rigidity of the clitoris) are both from 1590s.