Etymograph

English

swordtail

From sword + tail.

A compound of sword + tail

Proto-Germanic *swerdą ‘sword’

Proto-West Germanic *swerd ‘sword’

Old English sweord ‘sword’

West Midland Middle English sword

English sword

Proto-Indo-European *deḱ- ‘to tear, fray, shred’

…

Proto-Germanic *taglą ‘hair, fiber’

Proto-West Germanic *tagl

Old English tæġel

Middle English tail

English tail

Today it means

noun One of many species of freshwater fish, in genus Xiphophorus, others of which are called platyfish.

Sources

Sources: Wiktionary, “swordtail”. 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 / swordtail