the.com/transgression

means An act of stepping over a known boundary, rule, or moral line — a violation committed with at least some awareness that a limit existed.

from From Latin 'transgressio,' built from 'trans-' (across) plus 'gradi' (to step or walk) — the same root that gives English 'grade' and 'gradual.' So at its core the word is strikingly literal: it just means 'a stepping across.' It entered English through religious and legal French and Latin usage, where crossing the line was never just a metaphor — it was sin or crime, the boundary made by law or commandment and then walked straight over.