Choose the appropriate word which can be substituted for the given sentence: $A$ remedy for all diseases.

Choose the appropriate word which can be substituted for the given sentence: $A$ person who talks about or supports the welfare of women or feminism.

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: 'One who is determined to exact full vengeance for wrongs done to him'.

Choose the appropriate word which can be substituted for the given sentence: $A$ person interested in collecting,studying and selling of old things.

Choose the appropriate word which can be substituted for the given sentence: 'Tending to move away from the centre or axis'.