Antonyms of adj hard-and-fast

1 sense of hard-and-fast

Sense 1
hard-and-fast, strict -- ((of rules) stringently enforced; "hard-and-fast rules")

INDIRECT (VIA invariable) -> variable -- (liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses")

Similarity of adj hard-and-fast

1 sense of hard-and-fast

Sense 1
hard-and-fast, strict -- ((of rules) stringently enforced; "hard-and-fast rules")
       => invariable (vs. variable) -- (not liable to or capable of change; "an invariable temperature"; "an invariable rule"; "his invariable courtesy")