First Known Use of hard-and-fast
Synonymscertain, determinate, final, firm, flat, frozen, hard, hard-and-fast, inexpugnable, set, settled, stable
Antonymsalterable, changeable, elastic, flexible, mutable, variable
Related Wordsnonadjustable, noncancelable, nonnegotiable, unchangeable; constant, steady, unchanging, uniform, unwavering; definite, exact, explicit, specific; given, stated, stipulated; dependable, good, reliable, responsible, safe, solid, sure, tried, tried-and-true, true, trustworthy, trusty
Near Antonymsadjustable, changeable, negotiable; indefinite, open-ended, unspecified; capricious, changeful, flickery, fluctuating, fluid, inconstant, mercurial, mutable, temperamental, uncertain, unpredictable, unsettled, unstable, unsteady, variable, volatile
HARD-AND-FAST Defined for English Language Learners
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