Definition of Ascertain:

make sure

Synonyms of Ascertain:

find out, confirm, verify, determine, divine, dig, eye, read, fix, discover, tell, see, settle, identify, learn, peg, establish, check, size, check out, pick up, double-check, eyeball, learn the ropes, catch on, check up on, get down cold, get down pat, get hold of, get it down, get the hang of, look-see, make certain, make sure, pick up on, size up

Opposite/Antonyms of Ascertain:

confuse, overlook, miss, help, neglect, look away, assist, aid, ignore, unsettle, destroy, misunderstand, invalidate, disprove

Sentence/Example of Ascertain: