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

He is right to imply that the political structure is a little shaky—it was a myth that it was ever rock solid.

—Xan Smiley

Examples of rock-solid in a Sentence

Recent Examples on the Web

This 44% discount brings a rock-solid, name-brand mini speaker down to impulse-buy territory, giving campers and travelers a rare chance to grab serious volume and rugged durability without the strain of the standard retail price. — Juhi Wadia, PC Magazine, 21 Sep. 2026

That’s a rock-solid depth chart at the position — all three will move the needle offensively for Bakersfield. — Allan Mitchell, New York Times, 4 Sep. 2026

These hyperscalers' rock-solid balance sheets made their stocks safe havens during periods of economic uncertainty and market volatility, such as the Silicon Valley Bank crisis in 2023. — Paulina Likos, CNBC, 28 Aug. 2026

Saturday will be Simpson’s first chance to make an impression on fans – some of whom were left bewildered by his selection, considering the ever-rock-solid standing of Stafford. — Benjamin Royer, Oc Register, 14 Aug. 2026

Word History

First Known Use

1871, in the meaning defined above

Rhymes for rock-solid

• semisolid
• solid
• squalid
• stolid