"gauntest" in the adjective sense
1. cadaverous, emaciated, gaunt, haggard, pinched, skeletal, wasted
very thin especially from disease or hunger or cold
"a nightmare population of gaunt men and skeletal boys"
"eyes were haggard and cavernous"
"small pinched faces"
"kept life in his wasted frame only by grim concentration"
Source: WordNet® (An amazing lexical database of English)
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