まんえん
man'en

Noun
Suru Verb

1. spread (e.g. of a disease); rampancy; infestation; proliferation; being widespread

Intransitive
こん悪性あくせい風邪かぜがまんえんしている。
kon'akusēno kazega man'en shite iru.
A bad cold is going about now.
Other forms: