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gulch

noun
🔊/ɡʌltʃ/
🔊/ɡʌltʃ/
 (especially North American English)
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  1. a narrow valley with steep sides that was formed by a fast stream flowing through it（两边陡峭的）急流峡谷Topics Geographyc2
    Word Originmid 19th cent.: perhaps from dialect gulch ‘to swallow’.