lackluster

/ˈlæklʌstə/noun

An absence of shine, energy, or anything interesting.

Example sentence

“After weeks of poor sleep, there was a noticeable lackluster in his eyes.”

Usually an adjective in practice: a lackluster performance, lackluster sales. British spelling is 'lacklustre'.

Related words

laconicSaying a lot in very few words; brief and to the point.labyrinthA confusing tangle of paths or passages in which it is easy to get lost; a maze.lagoonA stretch of shallow water cut off from the open sea by a strip of sand, rock, or reef.laboratoryA room or building set up with special equipment for scientific experiments, research, or testing.lakeA big body of water, or a similar liquid, that is enclosed by land on all sides.knowledgeInformation and understanding about a subject, place, or situation that a person has gained.