SAT TOEFL IELTS invaluable Definition Extremely useful; too valuable to be measured. 日本語 価値が測りつかない Example "Her advice was invaluable during the crisis." Sign in to save SAT Quiz → TOEFL Quiz → IELTS Quiz → ← invalidate invariably → Study tips featuring "invaluable" Map Each Word Into a Connected Network Map the Author's Attitude Before Reading Questions Audit Your Own Writing for Lexical Resource Related words SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal