innocuous
adjective /ɪˈnɒkjuəs/
  /ɪˈnɑːkjuəs/
(formal)- not intended or likely to offend or upset anyone synonym harmless (2)
- It seemed a perfectly innocuous remark.
 - The question appeared innocuous enough, but I still did not trust her.
 
Oxford Collocations Dictionaryverbs- appear
 - be
 - look
 - …
 
- perfectly
 - totally
 - fairly
 - …
 
 - not harmful or dangerous synonym harmless (1)
- an innocuous substance
 
Extra Examples- The liquid looked fairly innocuous.
 - Some mushrooms look innocuous but are actually very poisonous.
 
Oxford Collocations Dictionaryverbs- appear
 - be
 - look
 - …
 
- perfectly
 - totally
 - fairly
 - …
 
 
Word Originlate 16th cent.: from Latin innocuus, from in- ‘not’ + nocuus ‘injurious’, from nocere ‘to hurt’.