Synonyms of unshakeable in English:

unshakeable


See definition of unshakeable

adjective

1‘they both have an unshakeable confidence in the rightness of their own opinions’

SYNONYMS
steadfast, resolute, staunch, firm, constant, decided, determined, fixed, ingrained, unswerving, unwavering, unvacillating, unfaltering, unflinching
unyielding, inflexible, dogged, obstinate, persistent, unassailable, immovable, irremovable, indelible, iron, adamant, deep-dyed, indefatigable, tireless, unflagging, unremitting, unrelenting, relentless
ANTONYMS

weak, half-hearted