personal grudge

Kyūjitai form of 私鉄 (“private railway”)

play dumb, feign ignorance / (slang) evade one's responsibilities, especially by failing to appear to perform a duty

drunkard

薫香: incense / 勲功: merits

君側: vicinity of a lord

国君: / 国訓: kun'yomi; (linguistics) a kun'yomi that differs from the original Chinese meaning

雲隠れ: vanishing behind the clouds; disappearance, going into hiding; the death of a person of nobility or great importance

雲隠れ: to disappear, go into hiding

雲隠: an unnumbered chapter in The Tale of Genji, at the end of 幻 (Maboroshi, chapter 41), of which the death of the protagonist Hikaru Genji can be implied