English

subapex

From sub- + apex.

Formed from sub- + apex

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Proto-Indo-European *h₂ep- ‘water’

Proto-Italic *apeks

Latin apex ‘point, tip, summit’

English apex

Today it means

noun A subsidiary apex

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