怨恨[enkon] enmity
怨声[ensei] complaint
怨敵[onteki] sworn enemy
怨念[onnen] grudge
怨霊[onryou] revengeful ghost

旧怨[kyuuen] old grudge
怨み[urami] resentment
怨言[uramigoto] grudge
怨む[uramu] to resent
怨しい[urameshii] reproachful

威張り散らす[ibarichirasu] to domineer
胃散[isan] stomach medicine
逸散に[issanni] at top speed
一目散[ichimokusan] at full speed
一目散に[ichimokusanni] at full speed

雲散霧消[unsanmushou] vanishing like mist
解散[kaisan] breakup
拡散[kakusan] scattering
閑散[kansan] deserted (esp. store, market, town, streets)
言散らす[iichirasu] to spread (a report)

敵わない[kanawanai] no match for
怨敵[onteki] sworn enemy
外敵[gaiteki] foreign enemy
敵う[kanau] to come true (wish)
仇敵[kyuuteki] bitter enemy

敵討[katakiuchi] vengeance
敵同士[tekidoushi] mutual enemies
旧敵[kyuuteki] old enemy
強敵[kyouteki] formidable enemy
公敵[kouteki] public enemy

一進一退[isshinittai] now advancing and now retreating
引退[intai] retire
隠退[intai] retirement
隠退生活[intaiseikatsu] secluded life
遠退く[toonoku] to become distant

遠退ける[toonokeru] to keep (someone) at a distance
押し退ける[oshinokeru] to push aside
撃退[gekitai] repulse
減退[gentai] decline
後退[koutai] retreat