lackluster

Lacking brightness, luster, or vitality; dull. synonym: dull.

Wanting luster or brightness; dull; languid; said of the eyes.

A want of luster, or that which lacks brightness.

A lack of luster.

Wanting luster or brightness.

Lacking spirit, liveliness, or enthusiasm; dull.

Mediocre.

Lacking brilliance or intelligence

Having no shine or lustre; dull

Not exceptional; not worthy of special merit, attention, or interest; having no vitality