Synonyms of the word

defiant

• adj. defying.
• adj. Boldly resisting opposition.

difficult

• adj. Hard, not easy, requiring much effort.
• adj. (often of a person, or a horse, etc) Hard to manage, uncooperative, troublesome.
• adj. (obsolete) Unable or unwilling.
• v. (obsolete, transitive) To make difficult; to impede; to perplex.

disobedient

• adj. Not obedient.

insubordinate

• adj. Rebellious or defiant to authority.
• adj. Contumacious.

intractable

• adj. Not tractable; not able to be managed, controlled, governed or directed.
• adj. (mathematics) Not able to be solved (of a mathematical problem).
• adj. Stubborn; obstinate (of a person).
• adj. (medicine) Difficult to treat (of a medical condition).

noncompliant

• adj. Not compliant; rebellious.
• n. One who fails to comply, for example with a law.

obstreperous

• adj. Attended by, or making, a loud and tumultuous noise; boisterous.
• adj. Stubbornly defiant; disobedient; resistant to authority or control, whether in a noisy manner or not.

recalcitrant

• adj. Marked by a stubborn unwillingness to obey authority.
• adj. Unwilling to cooperate socially.
• adj. Difficult to deal with or to operate.
• adj. (botany, of seed, pollen, spores) Not viable for an extended period; damaged by drying or freezing.
• n. A person who is recalcitrant.

resistant

• n. A person who resists; especially a member of a resistance movement.
• n. A thing which resists.
• adj. Which makes resistance or offers opposition.
• adj. Which is not affected or overcome by a disease, drug, chemical or atmospheric agent, extreme of temperature,…
• adj. (statistics) Not greatly influenced by individual members of a sample.

resistive

• adj. (physics) Resisting the passage of electrical current.
• adj. Tending to resist.

unmanageable

• adj. Not manageable; not readily submitting to handling or management; not easily restrained, governed, or…

unwilling

• adj. Not willing; reluctant.