真しん剣けん交こう際さいMeaningsNoun1. serious relationship (esp. one with the prospect of marriage)Kanji used真truth剣sword交mingle際edgeComposed of真しん剣けんserious; earnest; real sword (as opposed to a wooden practice weapon)Na-adjective交こう際さいcompany; friendship; association; society; acquaintance; (romantic) involvement; datingNoun