TOEFL IELTS slippery Definition Smooth and hard to hold onto; likely to cause slipping. Example "The rocks by the waterfall were wet and slippery." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← slipper slit → Study tips featuring "slippery" 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