Synonyms of the word

unyielding

• adj. Not giving in; not bending; stubborn.

dogged

• v. simple past tense and past participle of dog.
• adj. stubbornly persevering, steadfast.

dour

• adj. Stern, harsh and forbidding.
• adj. Unyielding and obstinate.
• adj. Expressing gloom or melancholy; sullenly unhappy.

hard

• adj. (of material or fluid) Having a severe property; presenting difficulty.
• adj. (personal or social) Having a severe property; presenting difficulty.
• adj. Unquestionable.
• adj. (of a road intersection) Having a comparatively larger or a ninety-degree angle.
• adj. (slang, vulgar, of a male) Sexually aroused.
• adj. (bodybuilding) Having muscles that are tightened as a result of intense, regular exercise.
• adj. (phonetics, not comparable).
• adj. (art) Having a severe property; presenting a barrier to enjoyment.
• adj. (not comparable) In the form of a hard copy.
• adv. (manner) With much force or effort.
• adv. (manner) With difficulty.
• adv. (obsolete) So as to raise difficulties.
• adv. (manner) Compactly.
• adv. (now archaic) Near, close.
• n. (countable, nautical) A firm or paved beach or slope convenient for hauling vessels out of the water.
• n. (uncountable, drugs, colloquial, slang) crack cocaine.

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.

pertinacious

• adj. Holding tenaciously to an opinion or purpose.
• adj. Stubbornly resolute or tenacious.

stubborn

• adj. Refusing to move or to change one's opinion; obstinate; firmly resisting.

tenacious

• adj. Clinging to an object or surface; adhesive.
• adj. Unwilling to yield or give up; dogged.
• adj. Holding together; cohesive.
• adj. Having a good memory; retentive.

unregenerate

• adj. which cannot be transformed in mind and spirit.
• adj. stubborn.