Disorientated

[Kit]

A word describing one who has lost his/her [bearings] or direction.
[Disorientated] is the British English form of the American word [Disoriented], and is not incorrect or ignorant by any means or measure.

[Ernesto]

Having lost ones sense of direction; disoriented.

[Kai]

Disorientated is the British spelling/pronunciation (originally from a French word) of the US [slurred] and lazy variant [disoriented]. Meaning: Confused. To lose ones [sense of direction].

It appears in all English dictionaries (as opposed to US-English) and the word has been in use since (at least) circa 1704.

[Couch Potatoe]

past simple and past participle of disorientate