Your search for the postposition -niinaa because of, on account of has returned 3 entries

-niinaa

Aná’ázt’i’ ńtłóo’go biniinaa béégashii t’óó yigháńdaakah.

fence 3-loose.P-GO 3-because.of cow just 3-through-3-go.pl.P
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Because the fence is slack (loose), the cows go right through it. (YM 1987:678)

Doo ’ííłta’go biniinaa t’áá ’ałtsojį’ t’áá shídin hazlį́į́’.

neg 1-go.to.school.P-GO 3-because every-up.to just 1-without 1-become.P
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I got left out on everything because I did not go to school. (YM 1987:410)