Interest

a sense of concern with and curiosity about someone or something

a reason for wanting something done

the power of attracting or holding one's attention (because it is unusual or exciting etc.)

a fixed charge for borrowing money

(law) a right or legal share of something

(usually plural) a social group whose members control some field of activity and who have common aims

a diversion that occupies one's time and thoughts (usually pleasantly)

excite the curiosity of

be on the mind of

be of importance or consequence