Antonyms of adj meritorious

1 sense of meritorious

Sense 1
meritorious, meritable -- (deserving reward or praise; "a lifetime of meritorious service"; "meritorious conduct")

INDIRECT (VIA worthy) -> unworthy -- (lacking in value or merit; "dispel a student whose conduct is deemed unworthy"; "unworthy of forgiveness")

Similarity of adj meritorious

1 sense of meritorious

Sense 1
meritorious, meritable -- (deserving reward or praise; "a lifetime of meritorious service"; "meritorious conduct")
       => worthy (vs. unworthy) -- (having worth or merit or value; being honorable or admirable; "a worthy fellow"; "a worthy cause")