The term 'grata' is composed of two words, 'non' and 'PERSONA'. 'Non' is a Latin word meaning 'not' or 'NO', while 'PERSONA' is a Latin word meaning 'PERSON'. Together, the two words form the phrase 'non grata', which is used to describe someone who is not welcome or accepted in a particular place or situation. This phrase is often used to refer to someone who has been declared PERSONA non grata, meaning that they are NO longer allowed to remain in a certain place or situation.