専 （セン） exclusively doing ..., person who exclusively does ..., fetish for ..., someone with a fetish for ..., first, most important thing, number one priority

専業 （センギョウ） special occupation, principal occupation, specialty, monopoly

住専 （ジュウセン） housing-loan corporation

高専 （コウセン） technical college, higher schools and colleges

専ら （もっぱら） wholly, solely, entirely, exclusively, devotedly, fixedly, principally, mostly, chiefly, mainly

専らにする （もっぱらにする） devote oneself to, to do as one pleases, to act selfishly