interest
noun
1.
a sense of concern with and curiosity about someone or something
Derived from:
interest 2.
a reason for wanting something done
3.
the power of attracting or holding one's attention (because it is unusual or exciting etc.)
Derived from:
interest 4.
a fixed charge for borrowing money; usually a percentage of the amount borrowed
6.
(usually plural) a social group whose members control some field of activity and who have common aims