Synonyms of 'hang back'
▷ See hang
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If you demur, you say that you do not agree with something or will not do something that you have been asked to do.
At first I demurred when he asked me to do it.
If you hesitate to do something, you delay doing it or are unwilling to do it, usually because you are not certain it would be right. If you do not hesitate to do something, you do it immediately.
I will not hesitate to take unpopular decisions.
Thesaurus for hang back from the Collins English Thesaurus
If you hang back , you move or stay slightly behind a person or group, usually because you are nervous about something.