TOEFL IELTS foolish Definition Lacking good sense or judgment; unwise. Example "Making decisions without facts is foolish and often leads to regret." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← foolhardy foolproof → Study tips featuring "foolish" TOEFL Academic Vocabulary: Study by Topic Boost Your IELTS Writing With Precise Vocabulary Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze