thenceforth(副词):从那时起;自此以后(常用于较正式或叙述性的语境)。
/ˌðensˈfɔːrθ/
From that day, she was thenceforth known as “The Doctor.”
从那天起,她此后一直被称为“博士”。
He signed the agreement and thenceforth devoted his time to rebuilding trust between the two communities.
他签署了协议,并从此把时间投入到重建两个社群之间的信任之中。
thenceforth 由 thence(从那里/从那时)+ forth(向前、往后)组合而成,字面意思接近“从那一点往后”,因此引申为“从那时起、此后”。在现代英语中更常见于书面语、历史叙述或正式表达。