unshakable

Definitions of unshakable
  1. adjective
    marked by firm determination or resolution; not shakable
    synonyms: firm, steadfast, steady, stiff, unbendable, unfaltering, unwavering
    resolute
    firm in purpose or belief; characterized by firmness and determination
  2. adjective
    without flaws or loopholes
    synonyms: bulletproof, unassailable, watertight
    incontestable, incontestible
    incapable of being contested or disputed
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