Select the most appropriate ANTONYM of the given

Acrimony

Too powerful to be defeated or overcome

He gifted me a gym bag

Select the correctly spelt word.

A person who believes that nothing is known or can be known of the existence or nature of God. 

The old house was so sturdy that it could be shattered into pieces with a single blow. 

Choose the incorrectly spelt word.

Choose the one which best expresses the meaning of the given word .

Precarious

 Fill in the blanks with the appropriate antonym of the word in Italic from the options given:

Lave