rock solid

ADJECTIVE

trustworthy/trusty

Synonyms

WEAK

accurate always there authentic authoritative convincing credible dependable ethical exact honest honorable kosher levelheaded mature on the level on the up and up open plausible principled realistic responsible righteous saintly secure sensible solid square steadfast straight there to be trusted tried tried-and-true true true-blue trustable truthful unfailing up-front upright valid veracious

Antonyms

WEAK

corrupt unbelievable undependable unreliable untrustworthy

ADJECTIVE

unfailing

Synonyms

STRONGEST

bottomless boundless eternal inexhaustible steadfast unflagging

WEAK

absolute assiduous ceaseless come-through consistent constant continual continuing continuous counted-on delivering dependable diligent dyed-in-the-wool endless faithful infallible invariable loyal never-failing persistent reliable same solid staunch straight sure surefire there tried-and-true true trustworthy unlimited unrelenting

Antonyms

STRONGEST

changing limited

WEAK

failing impermanent uncertain unsure

ADJECTIVE

well-founded

Synonyms

WEAK

based on hard data based on hard facts factual proven solid substantiated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The RWD version—rated at 315 hp and 332 lb-ft—is agreeably nimble, well balanced, rock solid and hella responsive.

From The Wall Street Journal • May 16, 2026

"Taiwan is responsible for safeguarding our own country," Lai told AFP, insisting the US-Taiwan relations were "rock solid".

From Barron's • Feb. 12, 2026

The fundamentals of the argument were rock solid.

From Slate • Feb. 12, 2026

Once rock solid, his reliance on his two main allies - China and Russia - now appears increasingly uncertain.

From BBC • Dec. 12, 2025

Aimee talked to me about adding hours to my training regimen so that I could become so rock solid on all my skills, I could go out and just enjoy myself in competition.

From "Courage to Soar" by Simone Biles

rock solid

Example Sentences

Related Words