Antonyms of "Unfit": Fit, Suitable, Qualified, Capable

Antonyms for unfit (not suitable, not qualified, not healthy):

• Fit – physically healthy; appropriate
• Suitable – proper for purpose
• Qualified – meeting standards, credentials
• Capable – having ability
• Competent – adequately skilled
• Able – having capacity
• Eligible – meeting criteria
• Proficient – skilled, expert

Context determines best choice: physical fitness → fit; job requirement → qualified/competent; general appropriateness → suitable.