1 to forget

2 to overlook

3 to neglect

1 to forget

1 calm and collected

2 unperturbed

1 forgetful

1 cold

2 indifferent

1 for the common good and forgetting personal interests (idiom); to behave altruistically

2 selfless

1 don't forget past events, they can guide you in future (idiom); benefit from past experience

1 Drinking the water of a well, one should never forget who dug it. (idiom)

1 a gentleman's friendship, insipid as water (idiom, from Zhuangzi 莊子|庄子[Zhuāng zǐ])

1 to forget past pains once the wound has healed (idiom)