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verb no object

pause before saying or doing something, especially through uncertainty:

«…のことで» ためらう, ちゅうちょする, たじろぐ «over, in, about»

e.g. she hesitated, unsure of what to say.

with infinitive be reluctant to do something:

〖～ to do〗 …するのをためらう［遠慮する］

e.g. he hesitated to spoil the mood by being inquisitive.

proverb delay or vacillation may have unfortunate or disastrous consequences.

hesitater |-ˌtātər| noun

hesitatingly |ˈhezəˌtādiNGlē| adverb

early 17th century: from Latin haesitat- ‘stuck fast, left undecided’, from the verb haesitare, from haerere ‘stick, stay’.