One Word Substitution

Substantial means something large in amount, value or importance.

Option (1) is correct.

It means unimportant and not worth worrying about.

Informal: To be full of desire or eagerness for something.

It means to think carefully about something for a long time.

It means clear and with only one possible meaning.

It means a temporary structure that is built across a road, gate, or door to prevent people from getting through.

It means to become gentler, relaxed and satisfied.

Explanation for option1: It means showing disrespect to what is regarded as sacred. So, this is correct. Explanation for option2: It means to cheat or fool. Explanation for option3: Purify is opposite in meaning. Explanation for option4: It means abuse, i.e. to treat roughly or cruelly.

Explanation for option 1: Fatalist means one who believes in the supremacy of fate.  Explanation for option 2: It means one who is not easily pleased. Explanation for option 3: It means one who does not get tired. Explanation for option 4: It is used for someone who is self-indulgently carefree, unconcerned about or lacking any serious purpose. So, this is correct.

It means the forming of mental images, especially wondrous or strange fancies; imaginative conceptualising. 

To abrogate is to repeal or do away with a law, right, or formal agreement.

Rancour is a noun meaning long-standing bitterness or resentfulness.

Circumlocution is the use of many words where fewer would do, often in a deliberate attempt to be vague or evasive.

Conscientious describes a person who is careful, thorough, and guided by a sense of right and wrong, often involving deliberate thought. The other options do not capture the nuance of deliberate action.