cur

noun
🔊/kɜː(r)/
🔊/kɜːr/
(old-fashioned, disapproving)
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  1. an aggressive dog, especially a mongrel恶狗;(尤指)杂种狗Topics Animalsc2
    Word OriginMiddle English (in the general sense ‘dog’): probably originally in cur-dog, perhaps from Old Norse kurr ‘grumbling’.