ぐんと

adverb

remarkably; noticeably; by a wide margin

Mimetic adverb describing a sudden, significant change or difference, often in degree, amount, or quality. Commonly used with verbs of change or comparison.

• 新あたらしいカメラは、前まえのよりぐんと画が質しつが良よくなった。

  The new camera has remarkably better image quality than the old one.

• 彼かれは練れん習しゅうのおかげでぐんと上じょう達たつした。

  He improved noticeably thanks to practice.