Synonyms

Irritable, full of complaints, ill humored, fractious, cranky

Laborious, strenuous, hard to achieve, demanding considerable mental effort and skill, grueling, backbreaking, characterized by the toilsome effort to the point of exhaustion.

Supposition means something that is assumed or taken for granted without proof. Assumption is a synonym as it also refers to something accepted as true without certain evidence. The other options are unrelated: tenuous means weak/doubtful, tacit means implied/unspoken, and wrenched means twisted forcibly.

Resolute means admirably purposeful, determined, and unwavering. Firm is the correct synonym as it also describes someone who is determined and steadfast in their decisions or opinions. Gullible means easily deceived, potted means confused/dazed, and quaint means attractively unusual or old-fashioned.

Capricious, based on individual discretion or preference rather than rational or reasonable thinking, impulsive, whimsical, Eg; Her arbitrary decisions have cost the company a lot of money

Suppress, suffocate, curb, hide, conceal, inhibit, extinguish, silence

Impatient, disrespectful in a frivolous way, trivializes something which deserved praise and attention, cheeky, thoughtless.

Uncommunicative, unemotional, self effacing, disinclined to talk

Conquer, defeat, vanquish, bring it complete control

Bloody stubborn, ill tempered, spiteful, nasty, obstinate, ornery

Uproar, confusion, disturbance, tumult

Sardonic, twist in a humorous way.

Ductile, malleable, supple, elastic, flexible

Unreliable, dishonest, without principles and rules

Quick witty reply, rejoinder, respond