unhesitating
Definitions
Not showing or feeling any hesitation; prompt and decisive.
Done or given without delay or reservation.
Examples
She gave an unhesitating response when asked if she wanted to join the team.
The rescue dog made an unhesitating leap into the cold water to save the swimmer.
Synonyms
decisive prompt instant resolute ready spontaneous determined
Antonyms
hesitant indecisive wavering tentative uncertain reluctant vacillating