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know?
lackluster (US), lacklustre (GB)
Lacking brightness, luster, or vitality
Synonyms:
blah, blind, boring, colorless, dark, dead, dim, drab, draggy, dry, flat, ho hum, laid back, leaden, lifeless, lusterless, mat, muted, nothing, obscure, phoned in, prosaic, somber, sombre, unimaginative, uninspired, vanilla, vapid, zero