だけ

Etymology 1
Derived from. Usage as a particle appears after 1600, during the.

Particle

 * : only, just, limit
 * 1) * 1905, 夏目漱石, 吾輩は猫である (Wagahai wa Neko de aru, “”), Mōri Yasotarō (tr.):
 * : amount, as much as
 * : amount, as much as
 * : amount, as much as
 * : amount, as much as

Usage notes
The particle is exclusively written in kana in modern usage.