ought BrE AmE ɔːt ɑːt —The combination ought to is often pronounced with a single t , as ˈɔːt ə AmE \ ˈɔːt̬ ə (especially before a consonant sound; also, especially BrE, ˈɔːt u before a vowel sound).
OUGHT
Meaning of OUGHT in English
Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012