say it: FOO-lish
foolish is an adjective meaning "devoid of good sense or judgment". It carries 2 recorded senses.
devoid of good sense or judgment
“foolish remarks”
“a foolish decision”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for foolish come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.