English

interscalene

From inter- + scalene.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Ancient Greek σκᾰληνός ‘uneven, unequal’

Late Latin scalēnus ‘of unequal sides’

Today it means

adj Between the scalene muscles

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

Etymograph / interscalene