interest (n.)

15世纪中叶,"法律上的要求或权利;关注;利益、优势、被关注或受影响(有利地)",来自古法语 interest "损害、损失、伤害"(现代法语 intérêt ),来自拉丁语 interest "it is of importance,it makes a difference"的名词用法,第三人称单数现时 interresse "to concern,make a difference,be of importance",字面意思是"介于",来自 inter "介于"(见 inter- )+ esse "to be"(来自PIE词根 *es- "to be")。法语和英语中的意义发展到"利润、优势"并不完全清楚。

较早的中英文单词是 interesse (14世纪末),来自英法 interesse "一个人在法律上有什么关注",来自中世纪拉丁文 interesse "赔偿损失",拉丁文 interresse 的名词用法(比较德语 Interesse ,来自同一中世纪拉丁文来源)。

金融意义上的"为使用借出的钱而支付的钱"(1520年代)较早地与 usury (根据教会法是非法的)相区别,是指"欠债人应得的赔偿"。"个人或自私的考虑"的意义来自1620年代。意为"几个人感兴趣的生意",来自1670年代。意思是"好奇心,觉得某事与自己有关,欣赏或同情的目光",最早见于1771年。 Interest group 从1907年开始见于此; interest rate 到1868年。

interest (v.)

"引起兴趣,引起注意",17世纪 ,更早的 interesse (1560年代),来自名词(见 interest (n. ))。或许也来自于 interess'd ,或受其影响, interesse 的过去分词。

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Definitions of interest from WordNet
interest (n.)
a sense of concern with and curiosity about someone or something;
an interest in music
Synonyms: involvement
interest (n.)
a reason for wanting something done;
in the common interest
in the interest of safety
Synonyms: sake
interest (n.)
the power of attracting or holding one's attention (because it is unusual or exciting etc.);
primary colors can add interest to a room
they said nothing of great interest
Synonyms: interestingness
interest (n.)
a fixed charge for borrowing money; usually a percentage of the amount borrowed;
how much interest do you pay on your mortgage?
interest (n.)
(law) a right or legal share of something; a financial involvement with something;
they have interests all over the world
Synonyms: stake
interest (n.)
(usually plural) a social group whose members control some field of activity and who have common aims;
the iron interests stepped up production
Synonyms: interest group
interest (n.)
a diversion that occupies one's time and thoughts (usually pleasantly);
he counts reading among his interests
Synonyms: pastime / pursuit
interest (v.)
excite the curiosity of; engage the interest of;
interest (v.)
be on the mind of;
Synonyms: concern / occupy / worry
interest (v.)
be of importance or consequence;
Synonyms: matter to