TOEFL IELTS stiff Definition Rigid or not easily bent; severe or formal in manner. Example "After the workout, his muscles felt stiff and sore." Sign in to save TOEFL Quiz → IELTS Quiz → ← sticky stiffen → Study tips featuring "stiff" Study the Exact Words Examiners Use Map Each Word Into a Connected Network Audit Your Own Writing for Lexical Resource 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