IPA: /ˌʌn.hɛz.ɪˈteɪ.tɪŋ/
KK: /ʌnˈhɛzɪˌteɪtɪŋ/
Describing someone who acts or speaks without hesitation or doubt; showing confidence and decisiveness.
She gave her unhesitating support to the new project.
Unhesitating → It is formed from "un-" (meaning not) and "hesitate" (from Latin "haesitare", meaning to stick or to hesitate). The word "unhesitating" means not hesitating or acting without delay.
Think of 'not' ('un-') hesitating, which means acting decisively without delay.