係

to have something to do with; to be concerned with; to have a connection with; to have relations with

to become involved in (something negative); to become entangled in; to get mixed up in

Economics

Engel's coefficient; proportion of one's income spent on food

Sports; Esp. 連係プレー

(good) teamwork; team play

連携プレー only

(close) cooperation; coordination; collaboration; teamwork

context (of a passage)

On signage

No Unauthorized Persons; No Unauthorized Entry; Authorized Personnel Only

tense relationship; tense relations; strained relations; strained ties; tension

relevant documents; (all) the documents related (to the matter)

bilateral relations; relationship between two countries

to relate to; to connect with

sexual relations; sexual relationship

cashier; treasurer; teller

relationship between Japan and the United States; Japanese-American relations

to whom it may concern

interested parties; persons concerned; stakeholder

dependence (relationship); dependency (relationship)

person involved in a gang; person with gangster associations; yakuza member

Grammar

relative pronoun

finance-related; financial

kinship

de facto marriage; common-law marriage; living together as husband and wife without formal marriage

to whom it may concern; to the involved parties; to all persons concerned

relationship; connection; involvement; entanglement; implication (e.g. in a crime)

social relationship; social context

business associate