interest

• n. 興味、趣味；関心；楽しみ；仲間
• vt......に関心を持たせる；......に関心を持たせる；......に......を巻き込む

ラテン語の interesse, care, concern から。inter-, within, in the midst of, mutually, -esse, to exist, be が語源で、is, essence, entity と同じ意味。後に経済学で利息を指すのに使われ、利殖と区別される。

interest

interest: [15] The Latin verb interesse meant literally ‘be between’ (it was a compound of inter ‘between’ and esse ‘be’). It was used metaphorically for ‘be of concern, be important, matter’, and appears to have been borrowed into Anglo-Norman as a noun, meaning ‘what one has a legal concern in or share of’. English took this over in the 14th century as interesse, but it gradually changed over the next hundred years or so into interest, mainly due to the influence of Old French interest ‘damage’, which came from the third person present singular form of the Latin verb.

The main modern sense ‘curiosity’ developed towards the end of the 18th century.

interest (n.)

mid-15c., "legal claim or right; concern; benefit, advantage;" earlier interesse (late 14c.), from Anglo-French interesse "what one has a legal concern in," from Medieval Latin interesse "compensation for loss," noun use of Latin interresse "to concern, make a difference, be of importance," literally "to be between," from inter- "between" (see inter-) + esse "to be" (see essence).

Compare German Interesse, from the same Medieval Latin source. Form in English influenced 15c. by French interest "damage," from Latin interest "it is of importance, it makes a difference," third person singular present of interresse. Financial sense of "money paid for the use of money lent" (1520s) earlier was distinguished from usury (illegal under Church law) by being in reference to "compensation due from a defaulting debtor." Meaning "curiosity" is first attested 1771. Interest group is attested from 1907; interest rate by 1868.

interest (v.)

"to cause to be interested," c. 1600, earlier interesse (1560s), from the noun (see interest (n.)). Perhaps also from or influenced by interess'd, past participle of interesse.

1. We have the interest of 500000 customers to think of.

50万人の顧客の利益を考えなければならない。

2.Hopes of an early cut in interest rates bolstered confidence.

金利は早期に引き下げられる見込みで、人々の自信を強めている。

3. Interest rates would come down as the recovery gathered pace.

回復が加速するにつれて金利が低下する。

4.The government was right to maintain interest rates at a high level.

政府が高金利を維持するのは正しい。

5.If raging infration returns,then interest rates will shoot up.

深刻なインフレが再発すれば、金利は急速に上昇する。