Your search for the postposition -yaaghah around the corner from has returned 2 entries

-yaaghah

around the corner from, disappearing behind, around the point from, on the other side

T’áá ch’ééh ’ásht’į́įgo bįįh biyaaghah ’eelwod.

just in.vain 1-act.NI-GO deer 3-around.corner 3- run.away.P
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I was still trying (to get a bead) when the deer went around a corner and disappeared. (YM 1987:258)