1 to regret

2 to repent

1 to come to realize

2 to appreciate (feelings)

1 to renege

2 to go back (on a deal)

3 to back out (of a promise)

1 to obstinately persist in going about things the wrong way (idiom)

1 Sun Wukong, the Monkey King, character with supernatural powers in the novel Journey to the West 西遊記|西游记[Xī yóu Jì]

2 Son Goku, the main character in Dragon Ball 七龍珠|七龙珠[Qī lóng zhū]

1 to obstinately persist in going about things the wrong way (idiom)

1 too late for regrets (idiom); It is useless to repent after the event.

1 to understand tacitly (idiom)

2 to know intuitively

3 to understand thoroughly

1 to regret one's past deeds (idiom)

1 too late for regrets (idiom); It is useless to repent after the event.