Etymograph

English

semidouble

From semi- + double.

Formed from semi- + double

Proto-Indo-European *sem- ‘one’

Proto-Indo-European *sēmi ‘half’

English semi-

Proto-Indo-European *dwi- ‘two’

…

Proto-Italic *duplos

Latin duplus ‘twofold’

Old French doble

Middle English double

English double

Today it means

adj Having the outermost stamens converted into petals, while the inner ones remain perfect.

Sources

Sources: Wiktionary, “semidouble”. 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 / semidouble