unshakable adj

1 marked by firm determination or resolution; not shakable; "firm convictions"; "a firm mouth"; "steadfast resolve"; "a man of unbendable perseverence"; "unwavering loyalty" [syn: firm, steadfast, steady, unbendable, unfaltering, unwavering]

2 without flaws or loopholes; "an ironclad contract"; "a watertight alibi"; "a bulletproof argument" [syn: ironclad, unassailable, watertight, bulletproof]

English

Adjective

1. That cannot be shaken or moved; unfaltering or unwavering
2. Having no errors or loopholes; unassailable

abiding, balanced, cool, fast, fiducial, firm, firm as Gibraltar, fixed, imperturbable, in equilibrium, predictable, reliable, secure, solid, sound, stable, steadfast, steady, substantial, unflappable, unflinching, unwavering, well-balanced, without nerves