著いちじるしく

adverb

remarkably; strikingly; considerably

Indicates a notable, often surprising degree of change or difference. Common in formal and written contexts.

• 今年ことしの夏なつは著いちじるしく暑あつい。

  This summer is remarkably hot.

• 売うり上あげが著いちじるしく伸のびた。

  Sales have grown considerably.