1 old variant of 因[yīn]

1 because

2 owing to

3 on account of

1 as

2 as if

3 such as

1 how

2 what way

3 what

1 if

2 in case

3 in the event that

1 just as in the past (idiom); as before

2 continuing as always

1 one day apart seems like three years (idiom)

1 lit. as clear as water (idiom)

2 fig. (of officials etc) honest and incorruptible

1 to make no distinction between what's one's own and what's another's (idiom)

2 to share everything

3 to be on very intimate terms

1 to know sth like the back of one's hand (idiom)

2 to know (a person, a place etc) inside out