of, pertaining to, or affected with lethargy; drowsy; sluggish.

producing lethargy.

adjective

active , busy , energetic , lively , vital , vivacious

adjective

apathetic , blah * , comatose , debilitated , dilatory , dopey , dormant , draggy , drowsy , dull , enervated , having spring fever , heavy , idle , impassive , inactive , indifferent , inert , lackadaisical , laggard , laid-back * , languid , languorous , listless , moony , nebbish , out of it , passive , phlegmatic , sleepy , sleepyhead , slothful , slow , slumberous , snoozy , somnolent , spiritless , stolid , stretchy , stupefied , supine , torpid , wimpy , hebetudinous , sluggish , stupid , stuporous , detached , incurious , insensible , unconcerned , uninterested , unresponsive , lackluster , lazy