beyond me

• incomprehensibleImpossible to understand
• confusingCausing mental uncertainty
• bafflingImpossible to understand
• puzzlingCausing confusion or bewilderment
• mysteriousBeyond easy comprehension

over my head · unfathomable · out of reach · too deep · lost · clueless · bewildering · perplexing · grasp · understanding · limits · horizon · impossible · hopeless · surrender · shrug · fog · murky

• confusionconfusion, confused, bewilderment, perplexity, baffled