専らにする

もっぱらにする

devote oneself to

専

せん

having a fetish for..., specializing in..., majoring in...

Ｂ専

ビーせん

attraction to ugly people

専技

せんぎ

full-time engineer, full-time technician

専一

せんいち せんいつ

exclusively, (taking) best care

専従

せんじゅう

working exclusively for, working full-time (for)

ロム専

ロムせん

lurker (on a forum)

外専

がいせん

person who dates only foreigners

ガリ専

ガリせん ガリセン

person physically attracted to thin people

ブス専

ブスせん

attraction to ugly people

専門

せんもん

speciality, specialty, subject of study, expert, area of expertise

専科

せんか

specialized course, specialised course

専売

せんばい

monopoly

専決

せんけつ

deciding or acting on one's own

専断

せんだん

arbitrary decision, on one's own authority, arbitrariness

専業

せんぎょう

special occupation, principal occupation, specialty, monopoly

専権

せんけん

arbitrary use of power

専有

せんゆう

exclusive possession or rights, monopoly

専念

せんねん

absorption, giving undivided attention, devoting oneself (to)