Learn Farsi: یک لیوان چای گرم، لطفاً.

In Farsi, the number one (yek) does double duty. It translates literally to "one", but it is also placed right before a noun to mean "a" or "an". So yek livan simply means "a glass".

There is no word for "of" in this sentence. How do we connect "glass" and "tea"?

Farsi connects nouns together using a short "e" sound added to the end of the first word. This linking vowel is called the ezafe, and it isn't usually written down in the Persian alphabet. To say "glass of tea", you add this sound to livan (glass), making it livan-e chay.

Does the adjective garm (warm) connect to "tea" the same way?

Exactly! The ezafe is also used to attach adjectives to nouns. "Warm tea" is pronounced chay-e garm. When we string the whole sentence together, the entire phrase is spoken as yek livan-e chay-e garm.

The word for "please" (lotfan) ends in a tall letter (Alef), but it's pronounced with an "an" sound. Why?

If you look closely at لطفاً, you will see two tiny diagonal lines over the final letter. This is a special pronunciation marker borrowed from Arabic. Whenever you see this symbol at the end of a Farsi word, it makes an "-an" sound, which gives us lotfan.