Superlative form of proud: most proud.; most proud.(adjective)
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Use "proudest" in a sentence
"Hear what she called her proudest accomplishment and what she says she definitely won't miss about the job."
"SELVA: In what he called the proudest moment of his life, Puckett was inducted into the Baseball Hall of Fame in his first year of eligibility in 2001."
"The master batsman, who began this month with what he described as his proudest moment when he helped India win the World Cup on his home ground in Mumbai, is the seventh recipient of the Wisden award."