TOEFL IELTS harmless Definition Not causing or capable of causing harm; safe and innocent. Example "The spider is harmless and won't bite anyone." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← harmful harmonic → Study tips featuring "harmless" 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