SAT GRE TOEFL placid Definition Calm and peaceful, not easily disturbed. Example "The lake was placid, reflecting the mountains like a mirror." Sign in to save SAT Quiz → GRE Quiz → TOEFL Quiz → ← placebo plagiarism → Study tips featuring "placid" Spot the Vocabulary Trap in Every Question Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable