1 cause

2 origin

3 root cause

4 reason

5 classifier: 个 gè

1 old variant of 因[yīn]

1 because

2 owing to

3 on account of

1 old practice

2 classifier: 个 gè

1 the ways of the world

1 complete change from the old rut (idiom); dramatic change of direction

2 a volte-face

3 to change old practices

1 mutually related karma (idiom); fates are intertwined

2 interdependent

1 meeting an old friend in a foreign place (idiom)

1 back to where we were (idiom); absolutely no improvement

2 Things haven't changed at all.

1 to be one's old self (idiom)

2 to be unchanged

3 (derog.) to be stuck in one's ways