lackluster
UK: ˈlækˌlʌstə | US: ˈlækˌlʌstər
adj. lacking brightness, shine, or vitality; dull or uninspiring
The word "lackluster" originated in the early 17th century, combining "lack" (from Middle English lakken, meaning "to be wanting") and "luster" (from Latin lustrare, meaning "to illuminate"). It originally described objects lacking physical shine but later evolved metaphorically to describe anything dull or uninspiring. The morphemes preserve their original spelling while clearly conveying the word’s dual-meaning structure: absence ("lack") + brilliance ("luster").
The actor gave a lackluster performance, failing to engage the audience.
Her lackluster presentation left the investors unimpressed.
The once-vibrant painting now looked faded and lackluster.
Despite high expectations, the product launch was lackluster.
His lackluster attitude toward work affected the entire team.