Antonyms of adj astute

1 sense of astute

Sense 1
astute, sharp, shrewd -- (marked by practical hardheaded intelligence; "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow")

INDIRECT (VIA smart) -> stupid -- (lacking or marked by lack of intellectual acuity)

Similarity of adj astute

1 sense of astute

Sense 1
astute, sharp, shrewd -- (marked by practical hardheaded intelligence; "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow")
       => smart (vs. stupid) -- (showing mental alertness and calculation and resourcefulness)