English

subefficient

From sub- + efficient.

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

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Latin efficiō ‘to work out, accomplish’

Latin efficiēns ‘accomplishing’

Today it means

adj Not efficient, inefficient

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

Etymograph / subefficient