狂躁[kyousou] mania
躁病[soubyou] mania
躁うつ[souutsu] manic-depressive (bipolar)
躁欝病[souutsubyou] manic depression
焦躁[shousou] fretfulness

躁うつ質[souutsushitsu] cyclothymia
軽躁[keisou] thoughtless
躁状態[soujoutai] manic state
躁転[souten] manic switch

軽目焼[karumeyaki] hard caramelized sugar candy
気軽[kigaru] carefree
軽い[karui] light (i.e. not heavy)
軽んじる[karonjiru] to look down on
軽音楽[keiongaku] light music

軽歌劇[keikageki] light opera
軽快[keikai] casual (e.g. dress)
軽機[keiki] light machine gun
軽機関銃[keikikanjuu] light machine gun
軽気球[keikikyuu] dirigible balloon