Simple past tense and past participle of rowel.(verb)
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Use "rowelled" in a sentence
"His mount shied in the presence of so much iron, and he rowelled its sides ruthlessly."
"There were hundreds of native horsemen and horsewomen, many of them doubtless on the dejected quadrupeds I saw at the wharf, but a judicious application of long rowelled Mexican spurs, and a degree of emulation, caused these animals to tear along at full gallop."
"He rowelled the destrier side-on into another Saracen mount and clashed blades."