relation
UK: rɪˈleɪʃ(ə)n | US: rɪˈleɪʃ(ə)n
n. 1. The way in which two or more people, groups, or things are connected or interact.
n. 2. A person who is connected by blood or marriage; a relative.
n. 3. (formal) The act of narrating or describing something.
The word "relation" traces back to Latin relatio (a bringing back, report), derived from re- (back) + latus (past participle of ferre, meaning "to carry"). The core idea is "carrying back" information or connections, which evolved into describing bonds between people or things. The suffix -ion turns the verb into a noun, solidifying its modern meanings of connection or kinship.
The relation between diet and health is well-documented.
She introduced him as a distant relation from her mother’s side.
His relation of the events was vivid and detailed.
The two countries have maintained diplomatic relations for decades.
There’s no relation between the two incidents—they’re purely coincidental.