One Word Substitution: Test-5

Stoicism means fortitude i.e. the ability of a person to endure pain or sorrow without expressing it which in turn means indifference towards pain.

Incorrigible means something that is not corrigible. Is firmly fixed; not easily changed.

Anarchist is a person who promotes disorder or excites revolt against any established rule, law, or custom.

Euphemism is the substitution of a mild, indirect, or vague expression for one thought to be offensive, harsh, or blunt.

Patricide is the act of killing one's own father while matricide is the act of killing one’s mother. Parricide, on the other hand, refers to the murder of your own father or mother. Thus, in this case, parricide is the best answer.