thenceforth
From Longman Dictionary of Contemporary Englishthenceforththence‧forth /ðensˈfɔːθ $ ˈðensfɔːrθ/ (also thenceforward /ðensˈfɔːwəd $ -ˈfɔːrwərd/) adverb formal THENstarting from that time → henceforthExamples from the Corpusthenceforth• But thenceforth the spacecraft is already in space.• They hanged Vesey along with thirty-four other accused rebels and the South thenceforth toughened its codes against slaves.