The spelling of the two words "are usual" can be quite tricky, especially for non-native English speakers. The first word "are" is pronounced as /ɑːr/ and is the present tense of the verb "to be" in the plural form. The second word "usual" is pronounced as /ˈjuːʒʊəl/ and means something that is commonly or regularly encountered. Remembering that the second word contains the letter "u" after the letter "s" (which is often silent in English) can help to properly spell and pronounce this phrase.
"Are usual" is not a single word, but a phrase consisting of the verb "are" and the adjective "usual". The word "usual" originated from the Latin word "usualis", which means "customary" or "usual". It came into Middle English around the 14th century, influenced by the Old French word "usuel". The verb "are" is the second-person plural form and first, second, and third person plural form of the verb "to be" in English. "Are" has its roots in Old English and can be traced back to the Proto-Germanic word "ǣru", meaning "grace" or "mercy".