English
enneatonic
From ennea- + tonic.
Proto-Indo-European *h₁néwn̥ ‘nine’
Proto-Hellenic *ennéwə ‘nine’
Ancient Greek ἐννέα ‘nine’
English ennea-
Proto-Indo-European *ten- ‘to stretch, extend’
Proto-Indo-European *tónos ‘something stretched’
Proto-Hellenic *tónos ‘rope, cord’
Ancient Greek τόνος ‘a cord, rope or string’
Ancient Greek τονικός ‘tonic, accentual’
English tonic
Today it means
adj Based on nine tones.
Language periods are conventional ranges, not dates for this word.
Etymograph / enneatonic