How Do You Spell PASTPAST?
Pronunciation: [pˈastpast] (IPA) 
The word "pastpast" may seem redundant, but it's actually a phonetic transcription of the past participle form of the verb "to pass." In IPA, it is spelled as /pæst pæst/. The repetition of the word is used to indicate that the vowel sound in the second syllable is pronounced in the same way as the first, and also to differentiate it from the noun form "past" which is pronounced with a different vowel sound (/pæst/). So next time you come across the double "pastpast," know that it's just a clever way to clarify pronunciation.
