TOEFL IELTS threaten Definition To indicate an intention to harm or cause someone distress. Example "The dark clouds threaten a storm before evening." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← threadlike threateningly → Study tips featuring "threaten" 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