Second-person singular present simple form of ought(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "oughtest" in a sentence
"So the Angel said: thy phantasy has imposed upon me & thou oughtest to be ashamed."
"Would to God I could convince thee as easily where thou oughtest to seek, and art sure to find, consolation, as"
"Quicquid sibi imperavit animus obtinuit (as [3414] Seneca saith) nulli tam feri affectus, ut non disciplina perdomentur, whatsoever the will desires, she may command: no such cruel affections, but by discipline they may be tamed; voluntarily thou wilt not do this or that, which thou oughtest to do, or refrain, &c., but when thou art lashed like"