rock-solid
adjective
rock-sol·id
ˈräk-ˈsä-ləd 
variants
or rock solid
: completely or perfectly solid (as because of great strength or dependability)
supported by a rock-solid foundation
She has a rock-solid reputation.
Their relationship was rock solid.
… she moved in an artificial world without ever losing her rock-solid integrity.—
Walter Clemons
Walter ClemonsHe is right to imply that the political structure is a little shaky—it was a myth that it was ever rock solid.—Xan Smiley
Xan SmileyExamples of rock-solid in a Sentence
Recent Examples on the Web
The all-new E13 shrinks down Escape Trailer's rock-solid insulated fiberglass construction to two-sleeper+ size, creating a tiny habitat that tows and stows with ease.
—New Atlas, 2 Dec. 2025
The Eagles have been rock-solid favorites this season, posting a 7-3 record straight-up in 10 games where they were favored.
—Tyler Everett, MSNBC Newsweek, 28 Nov. 2025
America’s treaty alliances with South Korea and Japan are rock-solid in large part because of these institutional (political and military) linkages.
—Bilal Y. Saab, Time, 22 Nov. 2025
Its Auxetic liner wraps the foot evenly for instant comfort, while Lange’s cuff-to-shell design delivers smooth, precise energy transfer and rock-solid edge control.
—Jenny Wiegand, Outside, 14 Nov. 2025
See All Example Sentences for rock-solid
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New Atlas, 2 Dec. 2025
The Eagles have been rock-solid favorites this season, posting a 7-3 record straight-up in 10 games where they were favored.
—Tyler Everett, MSNBC Newsweek, 28 Nov. 2025
America’s treaty alliances with South Korea and Japan are rock-solid in large part because of these institutional (political and military) linkages.
—Bilal Y. Saab, Time, 22 Nov. 2025
Its Auxetic liner wraps the foot evenly for instant comfort, while Lange’s cuff-to-shell design delivers smooth, precise energy transfer and rock-solid edge control.
—Jenny Wiegand, Outside, 14 Nov. 2025
See All Example Sentences for rock-solid
Cite this Entry
“Rock-solid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rock-solid. Accessed 12 Dec. 2025.
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