Synonyms of the word 
UNHESITATING → DECISIVE - RESOLUTE
unhesitating
- adj. Not hesitating; with no hesitation.
decisive
- adj. Having the power or quality of deciding a question or controversy; putting an end to contest or controversy;…
- adj. Marked by promptness and decision.
resolute
- adj. Firm, unyielding, determined.
- adj. (obsolete) Convinced; satisfied; sure.
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