What does foisty mean?
Foisty means mouldy, musty, fusty.
/ˈfɔɪstɪ/ · adjective
mouldy, musty, fusty.
Thrash not Wheat to keep untill March, lest it prove foisty.
Papers 150 years old, mildewed, rotten and stinking like muck; and mouldy foisty old books dating from 1638.
Choose a synonym only when it preserves the intended meaning, tone, and grammar of the full sentence.
Foisty means mouldy, musty, fusty.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Thrash not Wheat to keep untill March, lest it prove foisty.
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