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

Cubarsi and Laporte's rock-solid defense has leaked just one goal so far, while Merino has come off the bench twice in the last two games to score late winners and see Spain through. — Jibin Joseph, PC Magazine, 14 July 2026

The season record is rock-solid for a long-shot prop like a home run bet. — Josh Shepardson, Forbes.com, 10 July 2026

Boozer is the type of rock-solid producer the Grizzlies have desperately needed. — Julia Poe, Chicago Tribune, 22 June 2026

The two seemed like a rock-solid couple for almost two decades. — Lizzie Lanuza, StyleCaster, 16 June 2026

Word History

First Known Use

1871, in the meaning defined above

Rhymes for rock-solid

• semisolid
• solid
• squalid
• stolid