専せんsenNoun, used as a suffixexclusively doing ...; person who exclusively does ...; fetish for ...; someone with a fetish for ... · first; most important thing; number one priority
八専はっせんhassenNoun49th, 51st, 52nd, 54th, 56th, 57th, 58th or 60th day of the sexagenary cycle (said to be inauspicious with a high probability of rain)