- digression (n.)
[digression 词源字典]
- late 14c., from Latin digressionem (nominative digressio) "a going away, departing," noun of action from past participle stem of digredi "to deviate," from dis- "apart, aside" (see dis-) + gradi "to step, go" (see grade (n.)).[digression etymology, digression origin, 英语词源]