WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / S / slackness slackness noun 9 letters Scrabble 15 WWF 18 Definitions noun the quality of being loose (not taut) “he hadn't counted on the slackness of the rope” slack noun weakness characterized by a lack of vitality or energy inanitionlassitudelethargy noun the quality of being lax and neglectful laxitylaxnessremissness Look “slackness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →