恐らく[osoraku] perhaps
恐れ[osore] fear
恐れ戦く[osoreononoku] to tremble with fear
恐れ入る[osoreiru] to be sorry
恐ろしい[osoroshii] terrible

恐喝[kyoukatsu] blackmail
恐慌[kyoukou] panic
恐妻家[kyousaika] hen-pecked husband
恐妻病[kyousaibyou] wife-phobia
恐縮[kyoushuku] feeling obliged

一際[hitokiwa] conspicuously
学際的[gakusaiteki] interdisciplinary
真際[magiwa] on the verge of
金輪際[konrinzai] the deepest bottom of the earth
交際[kousai] company

交際家[kousaika] sociable person
交際嫌い[kousaigirai] unsociable
交際好き[kousaizuki] sociable
交際国[kousaikoku] friendly powers
交際社会[kousaishakai] society