(1):

(a.) Habitually idle and lazy; slothful; dull; inactive; as, a sluggish man.

(2):

(a.) Slow; having little motion; as, a sluggish stream.

(3):

(a.) Having no power to move one's self or itself; inert.

(4):

(a.) Characteristic of a sluggard; dull; stupid; tame; simple.