take off
With or without an object
Leave the ground (a plane)
The plane took off ten minutes late.
Remove clothing
She took off her coat and sat down.
With or without an object
It can be used with no object, and it can also take one. With an object it is usually separable: turn the volume up, turn it up.
The particle: off
This verb belongs to the group ‘setting out and leaving’.
Practise it
Add it to your daily practice or see every verb with off.
Further reading: take off on Wiktionary (CC BY-SA).