著しい
いちじるしい · ichijirushii · JLPT N1 · i-adj
remarkable
🏆 著 = to become evident or stand out (著名 = famous); 著しい = standing out clearly, remarkable
著 means conspicuous or evident, as in 著名 (famous). The しい ending makes it an adjective for differences or changes so clear they stand out, such as 著しい進歩 (remarkable progress).