Antonyms of adj energetic

2 senses of energetic

Sense 1
energetic (vs. lethargic) -- (possessing or exerting or displaying energy; "an energetic fund raiser for the college"; "an energetic group of hikers"; "it caused an energetic chemical reaction")

lethargic (vs. energetic), unenrgetic -- (deficient in alertness or activity; "bullfrogs became lethargic with the first cold nights")
        => 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; "a lackadaisical attempt"; "a languid mood"; "a languid wave of the hand"; "a hot languorous afternoon")
        => listless -- (lacking zest or vivacity; "he was listless and bored")

Sense 2
energetic, gumptious, industrious, up-and-coming -- (working hard to promote an enterprise)

INDIRECT (VIA enterprising) -> unenterprising, nonenterprising -- (lacking in enterprise; not bold or venturesome)

Similarity of adj energetic

2 senses of energetic

Sense 1
energetic (vs. lethargic) -- (possessing or exerting or displaying energy; "an energetic fund raiser for the college"; "an energetic group of hikers"; "it caused an energetic chemical reaction")
       => physical -- (characterized by energetic bodily activity; "a very physical dance performance")
       => alert, brisk, lively, merry, rattling, snappy, spanking, zippy -- (quick and energetic; "a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze")
       => canty -- (lively and brisk)
       => driving -- (acting with vigor; "responsibility turned the spoiled playboy into a driving young executive")
       => high-energy -- (providing a relatively large amount of energy upon undergoing a chemical reaction)
       => indefatigable, tireless, unflagging, unwearying -- (showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence")
       => strenuous -- (characterized by or performed with much energy or force; "strenuous exercise")
       => vigorous -- (characterized by forceful and energetic action or activity; "a vigorous hiker"; "gave her skirt a vigorous shake"; "a vigorous campaign"; "a vigorous foreign policy"; "vigorous opposition to the war")
          Also See-> active#5; dynamic#1, dynamical#1; enterprising#1; lively#1; spirited#1

Sense 2
energetic, gumptious, industrious, up-and-coming -- (working hard to promote an enterprise)
       => enterprising (vs. unenterprising) -- (marked by imagination, initiative, and readiness to undertake new projects; "an enterprising foreign policy"; "an enterprising young man likely to go far")