Antonyms of adj high-energy

2 of 3 senses of high-energy

Sense 2
high-energy -- (providing a relatively large amount of energy upon undergoing a chemical reaction)

INDIRECT (VIA energetic) -> lethargic, unenrgetic -- (deficient in alertness or activity; "bullfrogs became lethargic with the first cold nights")

Sense 3
high-octane, high-powered, high-power, high-voltage, high-energy -- (vigorously energetic or forceful; "a high-octane sales manager"; "a high-octane marketing plan"; "high-powered executives"; "a high-voltage theatrical entrepreneur")

INDIRECT (VIA dynamic) -> undynamic, adynamic -- (characterized by an absence of force or forcefulness)

Similarity of adj high-energy

3 senses of high-energy

Sense 1
high-energy -- (of or relating to elementary particles having energies of hundreds of thousands of electron volts)

Sense 2
high-energy -- (providing a relatively large amount of energy upon undergoing a chemical reaction)
       => 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")

Sense 3
high-octane, high-powered, high-power, high-voltage, high-energy -- (vigorously energetic or forceful; "a high-octane sales manager"; "a high-octane marketing plan"; "high-powered executives"; "a high-voltage theatrical entrepreneur")
       => dynamic (vs. undynamic), dynamical -- (characterized by action or forcefulness or force of personality; "a dynamic market"; "a dynamic speaker"; "the dynamic president of the firm")