Maker, taker, funding, spread and slippage. What each one is, when you pay it, and what actually changes the number at the bottom of a statement.
Nothing matches that. Try a shorter word.
Every exchange publishes two rates and almost none explains which one you will be charged. The honest answer is that most traders are on the expensive side far more often than they believe, and not because of anything they decided.
Everybody understands that leverage multiplies exposure. Far fewer notice that it multiplies the fee bill by exactly the same factor, on every single trade, whether the trade worked or not.