This is the 140th most frequent Czech word.
já
"I."
In this sentence, 'já' is used as the pronoun 'I', specifying the subject of the verb 'mám' (I have).
Já mám rád kávu.
I like coffee.
Here 'já' is used independently to answer a question, highlighting the speaker as the subject.
Kdo zpíval tu píseň? Já.
Who sang that song? I did.
In this example, 'já' is used within an interjection, 'já nevím' (I don’t know), and serves as part of an expression of uncertainty or hesitation.