Beseeming, a.
Becoming; suitable. [Archaic] -- Be*seem"ing*ly, adv. -- Be*seem"ing*ness, n.
1 other Webster entry under this spelling
Beseeming, n.
1. Appearance; look; garb. [Obs.] I . . . did company these three in poor beseeming. Shak.
2. Comeliness. Baret.
Shades of meaning
Fernald has no entry of its own for beseeming; he lists it under becoming.
He lists it without comment; the entries above explain its neighbors.