rock-solid

English

Adjective

rock-solid (comparative more rock-solid, superlative most rock-solid)

1. Alternative form of rock solid.
   • 2026 April 1, Philip Haigh, “Close encounter with '185s' inside Ardwick depot...”, in RAIL, number 1058, page 42:

     He reckoned the bodyshells were rock-solid, even after 20 years, as were the bogies. "We'll keep them running for the foreseeable future," he said. Rock-solid they may be, but the '185s' have been criticised for their weight.