English

hyperflexion

From hyper- + flexion.

Proto-Indo-European *úp

Proto-Indo-European *upér ‘over, above’

Proto-Hellenic *hupér

Ancient Greek ὑπέρ ‘over’

Latin flectō ‘to bend, curve’

Latin flexiō ‘a bending, swaying, turning, winding’

Today it means

noun Excessive flexion of a joint.

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

Etymograph / hyperflexion