is beyond me

something is beyond me

also it's beyond me

this is impossible to understand How they thought they could come in and out without anyone noticing is beyond me.

Name	Pronounced	Usage
Baldry	['bɔ:ldri]
Juuso	YOO:-so	Finnish
Altwidus	-	Ancient Germanic (Latinized)
RÉMi	re-MEE	French
Anar	-	Azerbaijani
Klementina	-	Slovene, Croatian