Translation Spanish English: acérrimo

1 accurate, assured, authentic, authoritative, certain, classic, classical, confident, convinced, correct, decisive, definite, definitive, dependable, exact, firm, foolproof, for sure, good, honest, incontrovertible, indisputable, irrefutable, positive, precise, reliable, right, safe, secure, sound, strong, sure, sure-footed, surefooted, true, trusted, unafraid, unfailing, untroubled.

2 adamant, adamantine, blunt, candid, fast, firm, forthright, frank, free-spoken, inexorable, intransigent, loyal, outspoken, plainspoken, point-blank, solid, staunch, steadfast, steady, stiff, straight-from-the-shoulder, strong, sure, tight, truehearted, unbendable, unfaltering, unshakable, unswerving, unwavering.

3 emboldened, firm, potent, powerful, reassuring, strong.

4 fast, firm, immobile, loyal, solid, steadfast, steady, stiff, strong, truehearted, unbendable, unfaltering, unfluctuating, unshakable, unwavering.

5 firm, hard, impregnable, inviolable, potent, secure, solid, stiff, strong, substantial, unassailable, unattackable, warm.

6 firm, hard, potent, present, stiff, strong.