1. Marked by firm determination or resolution; not shakable
   - firm, steadfast, steady, stiff, unbendable, unshakable, unwavering, unshakeable

See also: resolute

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• recreational facility
• recreational vehicle
• recreative
• recriminate
• recrimination
• recriminative
• recriminatory
• recross
• recrudesce
• recrudescence
• recrudescent
• recruit
• recruiter
• recruiting-sergeant
• recruitment
• recrystallisation
• recrystallization
• rectal
• rectal artery
• rectal reflex
• rectal vein
• rectangle
• rectangular
• rectangularity