専せん門もん技ぎ術じゅつせんもんぎじゅつMeanings1nounexpertise; specialized skill; technical know-howRefers to professional-level knowledge, techniques, or skills in a specific field.彼かれはITの専せん門もん技ぎ術じゅつを持もっている。He has expertise in IT.この仕し事ごとには高こう度どな専せん門もん