(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】【石字部】䂴 ·康熙筆画：12 ·部外筆画：7
《字彙補》五堅切，音硏。䂴考也。