"lackluster" in the adjective sense
1. lackluster, lacklustre, lusterless, lustreless
lacking brilliance or vitality
"a dull lackluster life"
"a lusterless performance"
2. lackluster, lacklustre, lusterless, lustreless
lacking luster or shine
"staring with lackluster eyes"
"lusterless hair"
Source: WordNet® (An amazing lexical database of English)
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