Chinese 拗口 aòkǒuHard to pronounce, lit. “mouth-defying”.

Not sure if this one’s been posted before but it’s used as an adjective to describe words that are hard to pronounce or don’t read smoothly - basically the opposite of “rolls off the tongue.” 拗 means to defy or disobey, while 口 means mouth. Love the imagery of a mouth vs word fight