adj. Function: adjective
1 firmly settled or established FF1C; trying to find a sure footing on the rugged slope FF1E;
Synonyms: fast, firm, secure, stable, staunch, strong; compare FAST 4 , STABLE 4
2 free from doubt, hesitation, or fear FF1C; upheld a sure faith FF1E;
Synonyms: abiding, enduring, firm, fixed, never-failing, steadfast, steady, unfaltering, unqualified, unquestioning, unshakable, unshaken, unwavering, wholehearted
Related Words: assured, changeless, constant, unchangeable, unchanging, uncompromising, unfailing, unvarying; certain, fixed, set
Contrasted Words: insecure, uncertain, unreliable; feeble, infirm, shaky, unsound; doubtful, dubious, hesitant
Antonyms: unsure
3
Synonyms: INFALLIBLE 1, inerrable, inerrant, unerring
4
Synonyms: INFALLIBLE 2, certain, surefire, unfailing
5 marked by unwavering assurance especially as to the rightness of one's views or actions FF1C; was sure he knew the answer FF1E;
Synonyms: certain, cocksure, confident, positive
Related Words: assured, self-assured, self-possessed, self-satisfied; arrogant, cocky, pert; decided, decisive
Contrasted Words: doubtful, hesitant, uncertain
Antonyms: unsure
6
Synonyms: POSITIVE 3, certain, incontestable, incontrovertible, indisputable, indubitable, uncontestable, undeniable, unequivocal, unquestionable
Related Words: convincing, telling; absolute, definite; genuine, real, valid