Antonyms of adj underfed

1 sense of underfed

Sense 1
ill-fed, underfed, undernourished -- (not getting adequate food; "gaunt underfed children"; "badly undernourished")

INDIRECT (VIA malnourished) -> nourished -- (being provided with adequate nourishment)

Similarity of adj underfed

1 sense of underfed

Sense 1
ill-fed, underfed, undernourished -- (not getting adequate food; "gaunt underfed children"; "badly undernourished")
       => malnourished (vs. nourished) -- (not being provided with adequate nourishment)