Antonyms of adj overactive

1 sense of overactive

Sense 1
hyperactive, overactive -- (more active than normal; "a hyperactive child")

INDIRECT (VIA active) -> inactive -- (not active physically or mentally; "illness forced him to live an inactive life"; "dreamy and inactive by nature")

Similarity of adj overactive

1 sense of overactive

Sense 1
hyperactive, overactive -- (more active than normal; "a hyperactive child")
       => active (vs. inactive) -- (characterized by energetic activity; "an active toddler"; "active as a gazelle"; "an active man is a man of action")