← BackshareGuessunenrgetic/ˌʌnɪnərˈdʒɛtɪk/adjectiveLacking energy, enthusiasm, or vigor; not energetic.The team's unenrgetic performance disappointed their coach.He gave an unenrgetic wave from the couch, too tired to get up.After a long day at work, she felt unenrgetic and just wanted to rest.SynonymssluggishlethargicAntonymsenergetic