sluggish
adj.
moving slowly
a sluggish stream
Synonym: sulky
adj.
(of business) not active or brisk
business is dull (or slow)|a sluggish market
Synonym: dull, slow
adj.
slow and apathetic
she was fat and inert|a sluggish worker|a mind grown torpid in old age
Synonym: inert, soggy, torpid