blossom (n.) Look up blossom at Dictionary.com
c.1200, from Old English blostm, blostma "blossom, flower, fruit," from Proto-Germanic *blo-s- (cognates: Middle Low German blosom, Dutch bloesem, German Blust), from PIE *bhlow-, extended form of *bhel- (3) "to thrive, bloom" (see folio). This is the native word, now largely superseded by bloom (n.1) and flower (n.).
blossom (v.) Look up blossom at Dictionary.com
late 14c., from Old English blostmian, from blostma "blossom, flower" (see blossom (n.)). Figurative use from late 14c. Related: Blossomed; blossoming.