dull adj.
VERBS appear, be, look, seem, sound | become, get The work gets a bit dull at times. | make sth The long lectures made the afternoon dull. | find sth
ADV. deadly, extremely, stupefyingly, very The film was long and deadly dull. | a bit, a little, fairly, pretty, rather, somewhat | disappointingly
You can also check other dicts: dull (English, 中文解释 ), wordnet sense, Collins Definition