Etymograph

English

triharmonic

From tri- + harmonic.

Formed from tri- + harmonic

Proto-Indo-European *tri- ‘three, threefold’

Proto-Italic *tri- ‘three, tri-’

English tri-

Proto-Indo-European *h₂er- ‘to join, fit, fix together’

Ancient Greek *ἁρμων

Ancient Greek ἁρμονία ‘harmony’

Ancient Greek ἁρμονικός ‘skilled in music’

Latin harmonicus

English harmonic

Today it means

adj Describing a class of sixth-order partial differential equations which arises in areas of continuum mechanics

Sources

Sources: Wiktionary, “triharmonic”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / triharmonic

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