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

為せる[saseru] to make (someone) do
其の為[sonotame] hence
の為に[notameni] for the sake of
スパイ行為[supaikoui] espionage
為め[tame] good

為さる[nasaru] to do
為しおえる[nashioeru] to accomplish
為しおわる[nashiowaru] to finish
為す[nasu] to build up
為て遣る[shiteyaru] to do for (someone)