介入する

• Reading: かいにゅうする
• Romaji: kainyuu suru
• Kanji breakdown: 介 (kai) — mediate, lie between; 入 (nyuu) — enter, insert
• Pronunciation: /ka.i.ɲɯː.sɯ.ɾɯ/

Meaning

To intervene; to step into a situation to influence or mediate the outcome.

A Group 3 (suru) verb used when a third party becomes involved in a dispute, market, or situation. Common in political and economic news, such as 為替介入 (currency intervention). Can carry a negative nuance of unwanted interference depending on context.

Examples

1. 政府が市場に介入して為替を安定させた。 The government intervened in the market to stabilize the exchange rate.
2. 親が子供の喧嘩に介入すべきかどうか迷った。 I was unsure whether parents should intervene in children's fights.
3. 国際機関が紛争に介入する可能性がある。 There is a possibility that international organizations will intervene in the conflict.

Usage Guide

Context: politics, economics, diplomacy

Tone: serious

Origin & History

Compound of 介 (mediate, lie between) + 入 (enter). The combination conveys the image of inserting oneself between parties, suggesting mediation or interference.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal