Choose the appropriate word which can be substituted for the given sentence: 'That which cannot be believed'.

Choose the appropriate word which can be substituted for the given sentence: $A$ religious discourse.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who tries to deceive people by claiming to be able to do wonderful things.

Choose the appropriate word which can be substituted for the given sentence: The custom or practice of having more than one husband at the same time.

Choose the appropriate word which can be substituted for the given sentence: 'When someone is not able to sleep'.

Choose the appropriate word which can be substituted for the given sentence: 'One absorbed in his own thoughts and feelings rather than in things outside'.