Word Class: 
I guess so, maybe you're right. This particle signals tentative agreement with some proposition. As the two examples below demonstrate, it frequently co-occurs with ep 'maybe'.
Kurungurr Example:
Yerrnyin tyagannawa ngini? Ep medityin werre ngini ne.
I wonder what that stuff was for? Maybe it was used to make medicine.
Kurungurr Example:
'Ep kine Tawun', ngiminyne. 'Ep ne', menyngiti.
'Maybe this is Darwin', I said to him. 'I guess so', he told me.