This is the 9738th most frequent Japanese word.
著し
"著し" (いちじるし, ichijirushi) means "remarkable" or "significant" in English.
著しく is used to describe a noticeable or significant degree of change.
彼の成績は去年と比較して著しく改善しました。
His grades improved significantly compared to last year.
著しい indicates the remarkable nature of advancements being discussed.
著しい進展が科学の分野で見られます。
Notable advancements can be observed in the field of science.
著しく is applied to signify the substantial effect of the new technology on productivity.