only, nothing but
Noun / Verb +
Noun +
When attached to a noun, it limits the scope to just that specific thing.
これは会員
This is for members only.
水
I only need water.
Verb (Dictionary form) +
When attached to the dictionary form of a verb, it indicates that the action is the only thing being done.
ただ待つ
I am just waiting.
彼は笑う
He only laughed.