Choose the appropriate word which can be substituted for the given sentence: 'Occurring at night'.

Choose the appropriate word which can be substituted for the given sentence: An act of killing human beings.

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'.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who has good knowledge of matters of taste such as fine arts,cuisines,music,etc.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who does not know how to read and write.

Choose the appropriate word which can be substituted for the given sentence: 'To accustom oneself to a foreign climate'.