"Shikō-sakugo 試行錯誤" means "trial and error" - the process of learning through repeated attempts and mistakes. It describes the iterative process of experimenting, failing, and improving until you succeed. EX. 「何度も試行錯誤を繰り返して料理の腕を磨きました！」 "I honed my cooking skills through a lot of trial and error!"