Antonyms of adj unassuming

1 sense of unassuming

Sense 1
retiring, unassuming -- (not arrogant or presuming; "unassuming to a fault, skeptical about the value of his work"; "a shy retiring girl")

INDIRECT (VIA modest) -> immodest -- (having or showing an exaggerated opinion of your importance, ability, etc; "brash immodest boasting")

Similarity of adj unassuming

1 sense of unassuming

Sense 1
retiring, unassuming -- (not arrogant or presuming; "unassuming to a fault, skeptical about the value of his work"; "a shy retiring girl")
       => modest (vs. immodest) -- (marked by simplicity; having a humble opinion of yourself; "a modest apartment"; "too modest to wear his medals")