に就て[nitsuite] concerning
に就き[nitsuki] because of
去就[kyoshuu] committing one's self
就いては[tsuiteha] in line with this
就きましては[tsukimashiteha] in line with this

就く[tsuku] to ascend (the throne)
就ける[tsukeru] to install (a king, emperor, etc.)
就学[shuugaku] entering school
就学義務[shuugakugimu] compulsory school attendance
就学児童[shuugakujidou] school child

衿元[erimoto] front of neck
衿足[eriashi] nape of neck
衿裏[eriura] lining of the collar
半衿[haneri] neckpiece (on a kimono)

衿芯[erishin] collar core (stiff fabric, etc. inside a collar)
衿下[erishita] usu. the drop between collar and bottom hem on kimono, yukata, etc.
衿先[erisaki] collar points