Like 'disoriented', the word 'disorientated' can be used to mean 'to cause someone to lose their sense of direction'. It can also be used to mean to 'confuse' someone. *The sudden change of plans left many of the teachers disoriented/disorientated.

Is disorientated proper English?

Both disoriented and disorientated are correct. However, it is more common in the United States to say the word disoriented and it is more common in the British countries to say the word disorientated.

Do you say disorientated or disoriented?

A: As far as we can tell, “disorientated” as well as “disoriented” are standard in British English, though “disorientated” is more popular. We've found both of these terms in searches of the British National Corpus, with “disorientated” about twice as common as “disoriented.” In fact, both appear in P. D. James novels.