示乎 si6 fu4 means “depending on” and it is super useful, especially when you don’t want to answer something that you are not sure of.
- Depends on the weather 示乎天氣 si6 fu4 tin1 hei3
- Depends on the Situation 示乎情況 si6 fu4 cing4 fong3
There are also other phrases to reject or throw people off when you are not sure:
"Let's see what happens"
tai2 haa5 dim2 laa1
"Let's figure it out when the time comes"
dou3 si4 sin1 syun3 laa1