蔓延

• Reading: まんえん
• Romaji: manen
• Kanji breakdown: 蔓 (man) — vine, spread; 延 (en) — extend, prolong
• Pronunciation: /maŋ.e̞ŋ/

Meaning

Spread; epidemic; prevalence; proliferation. The wide and often uncontrolled spreading of disease, misinformation, or a harmful phenomenon.

A noun and suru-verb (蔓延する) originally describing vines spreading across a surface, now primarily used for the spread of infectious disease, harmful ideas, or social problems. 感染症の蔓延 (spread of infectious disease) is the most common medical usage. The term implies difficulty in containment, suggesting the spread has exceeded manageable bounds.

Examples

1. 感染症の蔓延を防ぐため、政府は緊急の対策を打ち出した。 The government rolled out emergency measures to prevent the spread of the infectious disease.
2. インフルエンザが学校中に蔓延し、学級閉鎖が相次いだ。 The flu spread throughout the school, leading to one class closure after another.
3. 偽情報の蔓延が社会的パニックを引き起こすことがある。 The spread of misinformation can trigger social panic.

Usage Guide

Context: medicine, epidemiology, public health, social issues, news

Tone: urgent, serious

Origin & History

Sino-Japanese compound: 蔓 (man) refers to a creeping vine that spreads extensively, and 延 (en) means to extend or prolong. The metaphor of a vine spreading uncontrollably is applied to disease and other phenomena that proliferate widely.

Cultural Context

Era: Classical-Modern

Generation: Adult

Social background: Universal