栄枯盛衰[eikoseisui] ups and downs of life
減衰[gensui] attenuation
減衰器[gensuiki] attenuator
古び衰える[furubiotoroeru] to waste away
弱り衰える[yowariotoroeru] to languish

神経衰弱[shinkeisuijaku] neurasthenia
衰える[otoroeru] to become weak
衰え果てる[otoroehateru] to be utterly spent or crushed
衰運[suiun] declining fortunes
衰躯[suiku] emaciated body

淫蕩[intou] dissipation
春風駘蕩[shunpuutaitou] warm and genial spring weather
震蕩[shintou] shock
掃蕩[soutou] cleaning up
放蕩[houtou] dissipation

遊蕩[yuutou] self-indulgent pleasure
蕩す[tarasu] to cajole
蕩ける[torokeru] to melt (to a liquid)
見蕩れる[mitoreru] to be fascinated (by)
蕩尽[toujin] squandering

瀞み[toromi] stagnancy

瀞む[toromu] to stagnate

震盪[shintou] shock
掃盪[soutou] cleaning up
盪ける[torokeru] to melt (to a liquid)
盪尽[toujin] squander

盪盪[toutou] vast
脳震盪[noushintou] cerebral concussion
眼球振盪[gankyuushintou] nystagmus (rapid involuntary eye movements)
盪す[torokasu] to melt (steel, etc.)

意気銷沈[ikishouchin] depressed in spirits
銷却[shoukyaku] erasure
銷沈[shouchin] depression

銷夏[shouka] summering
銷する[shousuru] to disappear

矍鑠[kakushaku] vigorous (in old age)