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lacklustre is a state of missing quality,if a person or a thing has no brightness or liveliness.
The lacklustre economic recovery will keep loan demand weak.
This question demonstrates your lacklustre efforts at using a dictionary.
His taste was rather lacklustre.She was always a lacklustre person.
"Lackluster" means lacking in brightness, excitement, or interest. It describes something that is dull, unimpressive, or uninspiring.