This is the 156th most frequent Lithuanian word.
aš
"I."
The word 'aš' in this sentence is the subject pronoun meaning 'I'. It introduces the first-person singular subject of the sentence.
Aš esu studentas.
I am a student.
'Aš' is used as the subject pronoun referring to the first-person singular perspective of hearing in the context of the question.
Kas ten šneka? Ar aš girdėjau teisingai?
Who is speaking there? Did I hear correctly?
Here, 'aš' again functions as the subject pronoun indicating who is performing the action of going.