subject to

1 determined by something else <your extra piano lesson on Tuesdays is subject to the availability of the music room> Synonyms conditional, contingent (on or upon), dependent (to), tentativeRelated Words liable, open, susceptible; limited, modified, qualified, restricted; debatable, disputable, doubtable, doubtful, iffy, problematic (also problematical), questionable, shady, shaky, suspect, uncertainNear Antonyms absolute, all-out, arrant, categorical (also categoric), complete, consummate, out-and-out, outright, perfect, simple, total, ultimate, unadulterated, unalloyed, unconditional, unequivocal, unmitigated, unqualified, utter; basal, basic, fundamental, primaryAntonyms independent, unconditional

2 being in a situation where one is likely to meet with harm <this type of wound is highly subject to infection> Synonyms endangered, exposed, open, sensitive, liable (to), susceptible, vulnerableRelated Words likely, prone; uncovered, undefended, unguarded, unprotected, unscreened, unsecuredNear Antonyms covered, guarded, protected, safeguarded, screened, secured, sheltered, shielded, wardedAntonyms insusceptible, invulnerable, unexposed, unsusceptible