without interest

commonplace

(of talk, behaviour, work etc) causing a person to lose interest and feel tired

uninteresting

dull because too ordinary

boring, uneventful

long, tiring and not interesting

dull, monotonous

(of remarks, ideas, opinions) ordinary and dull

silly, commonplace

not enjoyable

boring, uneventful

not entertaining

boring, uneventful

not having, using, imagination

dull, predictable

dull; ordinary

dull, unoriginal