quagmire
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/ˈkwæɡmaɪər/
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/ˈkwæɡmaɪə(r)/
A muddy, wet, and unstable area.
The heavy rain soon turned the field into a quagmire, making it hard to walk.
A situation that is difficult to get out of or control.
The project turned into a quagmire, and it was hard to find a solution.