"unenergetic" | Definition and Related Words

Adjective

Deficient in alertness or activity (synset 300879020)
"bullfrogs became lethargic with the first cold nights"

also: inactive - not active physically or mentally
similar to:
- dazed, foggy, groggy, logy, stuporous - stunned or confused and slow to react (as from blows or drunkenness or exhaustion)
- dreamy, lackadaisical, languid, languorous - lacking spirit or liveliness
- listless - lacking zest or vivacity
same as: lethargic
Not inclined to be enterprising (synset 300888836)
similar to: nonenterprising, unenterprising - lacking in enterprise; not bold or venturesome

same as: slowgoing