Etymograph

English

rockpool

From rock + pool.

A compound of rock + pool

Old English *rocc

Middle English rocke ‘rock formation’

English rock

Proto-Germanic *pōlaz ‘pool’

Proto-West Germanic *pōl

Old English pōl ‘pool’

Middle English pool

English pool

Today it means

noun A tidepool.

Sources

Sources: Wiktionary, “rockpool”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / rockpool