Simple past tense and past participle of underfeed.(verb)
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Use "underfed" in a sentence
"In every great aggregation of workers, the faces of the underfed are a little paler and the pulses of the children beat a little less joyously, and the feet are hastened on that journey to the tomb -- all because of those who come to steal and to kill and to destroy."
"[The only photo accompanying this article is one of Sheriff Bartlett, and he sure doesn't look 'underfed' to me … but that extra"
"This week's victim is Casey, who makes the sacrificial decision to work the front of a very unruly house of underfed patrons and leaves her risky chicken-foot experiment in others' hands."