B1
If an action or event is impossible, it cannot happen or be done.
Dictionary examples:
Staying awake in a boring meeting? That's impossible without ten cups of coffee! (0.0)
Getting my teenager to clean their room? That's mission impossible! (0.0)
Finding matching socks in my drawer is impossible. They're all different! (0.0)
It seems impossible. (29.5)
It’s almost impossible to get them to agree on anything. (31.6)
The traffic noise made it impossible for me to sleep. (42.1)