横恋慕[yokorenbo] illicit love
失恋[shitsuren] disappointed love
はつ恋[hatsukoi] first love
色恋[irokoi] sensual love
道ならぬ恋[michinaranukoi] illicit love affair

悲恋[hiren] blighted love
恋い初める[koisomeru] to begin to love
恋い忍ぶ[koishinobu] to live on love
恋慕う[koishitau] to miss

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