negation in Pipil Nahuat

[Howard Quilliam Dickens]

Here in El Salvador we currently use the word "Inte" to imply negation
e.g. Inte ni-ueli (I cannot)
I am almost certain the the word, "inte", is a contraction and would
welcome any ideas as to it's original form. Occasionaly the word inteajka
are used to imply "it cannot be". As this contains the negating participle
aj (AH), it may provide a clue.
Any ideas are more than welcome!
Tasukamati uan tiyauj yamanik
Howard Dickens
Ahuachapan, El Salvador