Simple past tense and past participle of knell.(verb)
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Use "knelled" in a sentence
"The clang of the door of opportunity thus knelled in the ears of the colored house servant whirled the whole face of Negro advancement as on some great pivot."
"And not from the East and not from the West knelled that soul-waking cry"
"But its huge clocks had successively knelled three hours after midnight, and all continued still and silent as the grave."