instrumental で (by means of)
grammar166 sentences
The particle で marking the means, instrument, material, or method by which an action is performed — 箸で食べる ('eat with chopsticks'), 鉛筆で書く ('write with a pencil'), 電車で行く ('go by train'), 日本語で話す ('speak in Japanese'), 大声で叫ぶ ('shout in a loud voice'), 雪で覆う ('cover with snow'). One of で's foundational uses, distinct from で of location-of-action, cause/reason, and manner.