教

Meaning: “teach”

From either the classical 終止形 (shūshikei, “terminal form”) satoshi of modern adjective 聡い (satoi, “clever, sharp-witted”), or the 連用形 (ren'yōkei, “continuative or stem form”) satoshi of cognate verb 諭す (satosu, “to admonish, persuade, remonstrate → to redirect into a smarter direction”).