INTEREST

noun

1. The price paid for obtaining, or price received for providing, money or goods in a credit transaction, calculated as a fraction of the amount or value of what was borrowed.
2. Any excess over and above an exact equivalent
3. A great attention and concern from someone or something; intellectual curiosity.

verb

1. To engage the attention of; to awaken interest in; to excite emotion or passion in, in behalf of a person or thing.
2. To be concerned with or engaged in; to affect; to concern; to excite.
3. To cause or permit to share.