Antonyms of adj complacent

1 sense of complacent

Sense 1
complacent, self-satisfied, self-complacent -- (contented to a fault with oneself or one's actions; "he had become complacent after years of success"; "his self-satisfied dignity")

INDIRECT (VIA contented) -> discontented, discontent -- (showing or experiencing dissatisfaction or restless longing; "saw many discontent faces in the room"; "was discontented with his position")

Similarity of adj complacent

1 sense of complacent

Sense 1
complacent, self-satisfied, self-complacent -- (contented to a fault with oneself or one's actions; "he had become complacent after years of success"; "his self-satisfied dignity")
       => contented (vs. discontented), content -- (satisfied or showing satisfaction with things as they are; "a contented smile")