A blunder is the worst kind of mistake, and usually loses material immediately or leads to mate. A mistake is a smaller error, which may worsen your position. An innacuracy is just when you don't make the best move available.
Chess analysis

Well, I am no definition expert or anything, BUT this is how i interpret the definitions.
Blunder- Outright dropping a piece, something that could potentially lose the game in the long run, or immediately.
Mistake- A mistake is where drop a pawn or something that ISNT a game losing blunder, but something that will hurt for a while.
Inaccuracy- A move where there was something better, but it doesnt hurt you enough to lose the game, there was simply something better.
This is how I interpret them, i hope it helped!

A blunder is a move that loses a piece (or an exchange) or allows checkmate. An example would be a knight fork between a Queen and King.
A mistake is a move that is not as bad as a blunder, but causes a player to have a worse position. An example would be allowing your opponent to invade on your second rank with his Rooks.
An inaccuracy is simply a move that is not the best move possible.
Could someone please tell me the difference between a blunder, a mistake and an inaccuracy in the chess analysis results? Thanks.