Resolute
Part of speech: adjective
Definition: Firm, unyielding, determined. For example, she was 'resolute' in her determination to resist his romantic advances.
Example sentence: Ronald Reagan succeeded in bringing down the Iron Curtain by showing strength and resolutely standing up to the Soviet Union. President Trump needs to be similarly resolute towards Putin.
Unhesitating
Part of speech: adjective
Definition: Not hesitating; with no hesitation.