Antonyms of adj shameless

1 sense of shameless

Sense 1
shameless, unblushing -- (feeling no shame; "a shameless imposter"; "an unblushing apologist for fascism")

INDIRECT (VIA unashamed) -> ashamed -- (feeling shame or guilt or embarrassment or remorse; "are you ashamed for having lied?"; "felt ashamed of my torn coat")

Similarity of adj shameless

1 sense of shameless

Sense 1
shameless, unblushing -- (feeling no shame; "a shameless imposter"; "an unblushing apologist for fascism")
       => unashamed (vs. ashamed) -- (used of persons or their behavior; feeling no shame)