sure is one of the 1000 most common headwords. suppose - sure - surprise Pronunciation (UK) IPA (key): /ʃʊə(r)/, SAMPA: /SU@(r)/ (US) IPA (key): /ʃʊr/, SAMPA: /SUr/ Audio (US)(file) Adjective Positive sure Comparative surer Superlative surest When you are sure about something, you are certain. The student was sure that his answer was correct. Related words for sure surely assureWikiwand - on Seamless Wikipedia browsing. On steroids.