Choose the appropriate word which can be substituted for the given sentence: 'To take secretly in small quantities'.

Choose the appropriate word which can be substituted for the given sentence: 'The practice of having several wives'.

Choose the appropriate word which can be substituted for the given sentence: '$A$ man who always thinks of himself'.

Choose the appropriate word which can be substituted for the given sentence: '$A$ person who insists on a certain quality or strictly follows a specific behavior'.

Choose the appropriate word which can be substituted for the given sentence: 'Something that has no beginning or end and exists forever'.

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