(same as U+7814 研) to rub; to grind; to powder, to go the very source; to study; to investigate; to research; to examine; to search into carefully
?【午集下】【石部】 康熙筆畫：12畫，部外筆畫：7畫
《字彙補(bǔ)》五堅(jiān)切，音硏。?考也。
