To ignore or refuse to acknowledge an obvious problem, danger, or unpleasant fact, often in the hope that it will disappear or resolve itself without intervention.
Examples:
EN: Whether she did it legally or whatever... (Rhodes) It's very easy to bury one's head in the sand.
ID: Apakah dia melakukannya secara legal atau apapun. Sangat mudah untuk mengubur kepala seseorang di pasir.