irtisanominen (englanniksi)

layoff (s: US)
redundancy (s: UK / termination of employment by the employer due to economic reasons, i.e. not connected to the behaviour of the employee)
dismissal (s: termination of employment by the employer due to reasons depending on the employee)
sacking (s)
getting the sack ‚ firing (s: UK / US / colloquial for dismissal for any reason)