Mulish

//ˈmjuːlɪʃ// adj

Definitions

Adjective
  1. 1
    Characteristic of a mule; stubborn, obstinate, or intractable.

    "[…] a rickety verdigrised geyser which would spit two inches of tepid water into the bath and then mulishly stop working.""

Adjective
  1. 1
    unreasonably rigid in the face of argument or entreaty or attack wordnet

Etymology

From mule + -ish.

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