Synonyms of the word 
MULISH → HARDHEADED - OBSTINATE - STUBBORN - UNREGENERATE
mulish
- adj. Characteristic of a mule; stubborn, obstinate, or intractable.
hardheaded
- adj. Stubborn; wilful.
- adj. Realistic; pragmatic.
obstinate
- adj. Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.
- adj. Said of inanimate things not easily subdued or removed.
stubborn
- adj. Refusing to move or to change one's opinion; obstinate; firmly resisting.
unregenerate
- adj. which cannot be transformed in mind and spirit.
- adj. stubborn.
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