blomme.

From Old Danish blomæ (“flower”), from Old Norse blómi m, from Proto-Germanic *blōmô m (“flower”), cognate with Swedish blomma, English bloom, German Blume f, Gothic 𐌱𐌻𐍉𐌼𐌰 m (blōma). Derived from the verb *blōaną (“to bloom”) (cf. German blühen). These words go back to Proto-Indo-European *bʰleh₃- (“to bloom”), which is also the source of Latin flōs (hence English flower and Danish flor). The common modern meaning "plum" is due to contamination with another word, plomme (now obsolete), from Middle Low German plūme, from Old Saxon *plūma, from Proto-West Germanic *plūmā, cognate with English plum, German Pflaume. Norwegian plomme and Swedish plommon are also borrowed from Low German. The West Germanic word is an early loan from Latin prūnum, from Ancient Greek προῦμνον (proûmnon).