Adjective: unenergetic ,ún,e-nu(r)'je-tik
- Deficient in alertness or activity
"bullfrogs became unenergetic with the first cold nights";
- lethargic
- Not inclined to be enterprising
"The unenergetic nature of the bureaucracy frustrated many citizens";
- slowgoing
See also: dazed, dreamy, foggy, groggy, inactive, lackadaisical, languid, languorous, listless, logy [N. Amer], nonenterprising, stuporous, unenterprising