Sound as a bell

Meaning

Perfectly solid or functional.

Usage

Used to praise dependable reasoning or equipment.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Church bells that rang clearly signified flawless construction.

Borrowed from communications and engineering contexts in the 19th century.