Resembling a nun or some aspect of one.(adjective)
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Use "nunlike" in a sentence
"The Church, which gave single women in the mission field schools, hospitals, even outlying stations of their own to run—an autonomy unthinkable for mission wives—demanded nunlike austerity in return."
"I realize that my tank suit is Quaker and nunlike for this place."
"They dress the part, sir, to admiration — a sort of nunlike costume they come in:"