cromlech (Welsh) comes from Welsh llech, from Proto-Brythonic llex, from Proto-Celtic ɸlikkā, from Proto-Indo-European pl̥keh₂, from Proto-Indo-European pleh₂- — flat.
cromlech (Welsh): cromlech Welsh dolmen or underground tomb
Definitions
cromlech Welsh dolmen or underground tomb
Ancestry of “cromlech”, step by step
cromlech traces back through two separate lines of ancestry.