Reverse Dictionary: DULL (not bright)

ADJECTIVES
1435 ► HEAVISOME dull, gloomy, dark → obs. exc. Eng. dial.
1720 ► DUMB dull, dim; lacking brightness → obs.
..19C ► DUNDUCKITY of a dull, undecided colour → Eng. dial.
1928 ► FADEY → FADY dull, faded → Amer. dial.

VERBS
1601 ► DOR to make dull or dim in colour; to deaden → obs.