専せん門もん知ち識しきMeaningsNoun1. expertise; specialized knowledge; technical knowledge; expert knowledgeKanji used専specialty門gate知know識be conscious ofComposed of専せん門もんspeciality; specialty; special subject of study; area of expertise; (one's) field; (one's) major; sole interest; single focus; concentrating exclusively on; doing exclusively; …Noun知ち識しきknowledge; informationNounExamples1この種たねの専せん門もん知ち識しきは日にち常じょう生せい活かつとはほとんど関かん係けいがない。This kind of specialized knowledge has very little to do with daily life.