working together seamlessly and effectively, especially referring to teamwork or joint actions

A critical juncture or opportunity that serves as a catalyst for significant change or development.

a formal agreement or written contract between two or more parties

to get on well with each other; to be congenial in personality or spirit

Qidan or Khitan, ethnic group in ancient China, a branch of the Eastern Hu people inhabiting the valley of the Xar Murun River in the upper reaches of the Liao River

title deed for land

Anton Pavlovich Chekhov (1860-1904), Russian writer famous for his short stories and plays

deed for a house

Sochi (city on the Black Sea in Russia)

Giacomo Puccini (1858-1924), Italian opera composer

to get along well with someone; sharing similar views, interests, or dispositions

Appalachian Mountains in North America

A Soviet secret police agency and the forerunner of the KGB

contract for a loan

Leonardo Fibonacci (c. 1170-1250), Italian mathematician

completely compatible or identical; in perfect agreement as if matching two halves of a tally

a Christian association or gathering for spiritual mutual support and community

History of the Liao Dynasty, a 13th-century book on the history of the Khitan Empire (916-1125)

to engrave, carve, or etch characters or marks onto a hard surface (such as wood, bone, or stone).

adoptive mother or godmother

arrow used as a token of authority by field commanders

contract bridge (card game)

the culture of honoring contractual obligations

(literary) to be a good match

a formal agreement or legal contract between parties

Achaemenid Dynasty (559–330 BC), an ancient Iranian dynasty whose kings ruled the Achaemenid Empire.