The word 'spirea' entered English in the 17th century from the Latin genus name 'Spiraea', which itself was borrowed from Ancient Greek 'σπειραία' (speiraía). The Greek term referred to a plant used for garlands, derived from 'σπεῖρα' (speîra) meaning 'coil' or 'twist', likely describing the plant's spiraling or wreath-like growth habit or the shape of its flower clusters. This botanical name was later adopted in modern scientific Latin taxonomy and subsequently entered common English usage for this ornamental garden shrub.

This word is a simplex loanword from Latin. It does not contain separable, meaningful morphemes within its modern English spelling.