cut off
Separable
Remove a piece by cutting, or disconnect a supply
He cut off a slice of cheese.
Disconnect or interrupt
Our phone line was cut off for two days.
Separable
The object can go between the verb and the particle: turn the light off, or turn off the light. When the object is a pronoun it must go in the middle: turn it off, never turn off it.
The particle: off
This verb belongs to the group ‘cutting and separating’.
Practise it
Add it to your daily practice or see every verb with off.
Further reading: cut off on Wiktionary (CC BY-SA).