Why were they called suits?

Yo!

So a deck of cards has four suits: The heart,diamond,spade,and clubs. In those suits are 13 ranks, like the two of spades etc. But where does the joker pop in this.

Well some of you may ask well maybe its for old maid or etc. But for once i have made research it's uses aren't merely for old maid it can be used to replace certain cards depending on the suite. Jokers like the normal playing cards have suits like well I can't be bothered to write anything else why don't we talk about it's origin. Playing cards were made without the joker at first. So the joker resembles a jester or clown often perceived as laughing or having fun. Jokers resemble the Fool from tarot decks in which it's a fool, somebody doing stupid things.