Smart
Discerning, Sharp
い adjective
さとい
機敏 (きびん) Quick, Quick-Witted, Prompt
鋭敏 (えいびん) Sharpness, Quick Witted, Keenness
旨い (うまい) Delicious, Skillful, Clever
巧い (うまい) Adept, Skillful, Clever
賢い (かしこい) Clever, Intelligent
聡い (さとい) Smart, Discerning, Sharp
諭す (さとす) To Admonish, To Persuade, To Warn
悟る (さとる) To Realize
He saw さ toys とい as a Smart investment.