verb
1.
Synonyms: ensure , cinch, insure, secure
Contrasted words: abash, discomfit, embarrass; buffalo, bulldoze, cow, daunt, intimidate, shake; demoralize, disquiet, unman, unnerve
Antonyms: alarm
2.
to make one sure or certain of something
pinched his arm to assure himself he was awake
Synonyms: convince, persuade, satisfy
Idioms: bring ( or drive) home to, lead one to believe, sell one on something