1. deficient in alertness or activity; - Example: "bullfrogs became lethargic with the first cold nights" [syn: lethargic, unenrgetic]
WordNet (r) 3.0 (2006):
unenrgetic
adj 1: deficient in alertness or activity; "bullfrogs became
lethargic with the first cold nights" [syn: lethargic,
unenrgetic] [ant: energetic]