English

shaler

From shale + -er.

Formed from shale + -er

Proto-Indo-European *(s)kelH- ‘to split, cut’

Proto-Germanic *skalō ‘shell, husk’

Proto-West Germanic *skalu ‘shell, husk’

Old English sċealu ‘shell, husk, pod’

Middle English schale ‘shell, husk’

English shale

Today it means

noun A producer of shale oil.

Language periods are conventional ranges, not dates for this word.