gloam(n = noun.time) crepuscle, crepuscule, dusk, evenfall, fall, gloaming, nightfall, twilight - the time of day immediately following sunset; "he loved the twilight"; "they finished before the fall of night"
is a kind of hour, time of day
is a part of eve, even, evening, eventide
has particulars: night

1.  To begin to grow dark; to grow dusky. [1913 Webster]

2.  To be sullen or morose. [1913 Webster]

   The twilight; gloaming. Keats. [1913 Webster]

VB  be sullen, sulk, frown, scowl, lower, glower, gloam, pout, have a hangdog look, glout.