* Simple: The friendliest dog I've ever met greeted me with a wagging tail and a big smile.
* Descriptive: The cafe had a friendliest atmosphere, with the staff always ready to help and the customers chatting with each other.
* Comparative: While both cities were welcoming, I found London to be the friendliest of the two.
* Superlative: The friendliest person I know always remembers everyone's birthday and sends handwritten cards.
* Figurative: The friendliest thing about this city is its vibrant street art, making the whole place feel welcoming.
Remember, "friendliest" is the superlative form of "friendly," meaning it is the most friendly.