The correct spelling of the word "deja" is actually "déjà". The first letter is a French accent called an acute accent, which changes the pronunciation of the vowel e. In IPA transcription, the word is rendered as /de.ʒa/, with the acute accent indicating that the e should be pronounced as a close-mid front unrounded vowel (similar to the "e" in "pet"). Interestingly, the word "déjà" comes from the French phrase "déjà vu", meaning "already seen".
The word déjà is of French origin. It is derived from the French phrase déjà vu, which means already seen. Déjà vu is a term used to describe the feeling of experiencing something that seems familiar, even though it is the first time it is being encountered. The word déjà itself means already in French, and it is often used in conjunction with vu to form the complete phrase déjà vu.