冷ひえ募つのる

godan verb (-ru)

get colder; become chilled

Describes a gradual intensification of cold, often used for weather or bodily sensation. The verb 募る adds a sense of something growing stronger.

• 夜よが更ふけるにつれて冷ひえ募つのってきた。

  As the night deepened, it got colder and colder.

• 冷ひえ募つのる冬ふゆの朝あさ、布ふ団とんから出でるのがつらい。

  On a bitterly cold winter morning, it's hard to get out of bed.