Synonyms of innocuous
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harmlessIf you describe someone or something as harmless, you mean that they are not important and therefore unlikely to annoy other people or cause trouble.
• He seemed harmless enough.
• It was probably an innocent question, but he got very flustered.
inoffensiveIf you describe someone or something as inoffensive, you mean that they are not unpleasant or unacceptable in any way, but are perhaps rather dull.
• He's a mild, inoffensive man.
Thesaurus for innocuous from the Collins English Thesaurus
having little or no adverse or harmful effect; harmless