委任[inin] charge
委任状[ininjou] commission
一任[ichinin] entrusting
引責辞任[insekijinin] taking responsibility upon oneself (and resigning)
解任[kainin] dismissal

帰任[kinin] return to one's post
共同責任[kyoudousekinin] joint responsibility
兼任[kennin] concurrent post
後任[kounin] successor
口任せ[kuchimakase] random talk

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