concord
/ˈkɒŋkɔːd/noun
mass noun
1
- formal agreement or harmony between people or groups〈正式〉一致, 协调; 和睦; 和谐：
a pact of peace and concord.
和平友好公约。
1.1
- count noun a treaty条约; 协定, 协约。
2
- Grammar agreement between words in gender, number, case, person, or any other grammatical category which affects the forms of the words【语法】（性、数、格、人称等语法范畴）一致。
3
- count noun Music a chord that is pleasing or satisfactory in itself【乐】协和音。
词源
Middle English: from Old French concorde, from Latin concordia, from concors 'of one mind'， from con- 'together'+cor， cord- 'heart'.