Transgression
late 15th century (earlier (late Middle English) as transgression ): from Old French transgresser or Latin transgress- ‘stepped across’, from the verb transgredi, from trans- ‘across’ + gradi ‘go’.
wiktionary
From Middle English transgressioun, from Old French transgression, from Late Latin trānsgressiō, from Latin trānsgressus (perfect active participle of trānsgredior(“I step across”)) + -iō.
etymonline
transgression (n.)
late 14c., from Old French transgression "transgression," particularly that relating to Adam and the Fall (12c.), from Late Latin transgressionem (nominative transgressio) "a transgression of the law," in classical Latin, "a going over, a going across," noun of action from transgressus, past participle of transgredi "step across, step over; climb over, pass, go beyond," from trans "across, beyond" (see trans-) + gradi (past participle gressus) "to walk, go" (from PIE root *ghredh- "to walk, go"). Geological sense is from 1882.
