だけ

Particle: だけ
Function: Exclusive limit 'only'
Level: N4
How it works: Attaches to nouns or verb dictionaries to indicate that a quantity or scope is limited to that exact thing.
Example: Kore dake kudasai. Please give me only this.
Versus: しか (shika) also means 'only', but it must be followed by a negative verb to express limitation with despair or surprise.