Scumble

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Scumble: Soften the edges of an image.
Bumble: Type of bee, See Centrifugal Bumble-puppy in Huxley's Brave New World.
Fumble: Clumsy action.
Gumble: TV broadcaster.
Humble: Rare pie.
Jumble: Word puzzle.
Mumble: Speak indistinctly.
Rumble: Fight.
Tumble: Fall, smooth rocks by eccentric orbital abrasion.

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