TOEFL IELTS complain Definition To express dissatisfaction or pain about something. Example "Customers began to complain about the poor service." Sign in to save TOEFL Quiz → IELTS Quiz → ← complacency complaint → Study tips featuring "complain" 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