perplexing Antonyms

deep insight deep understanding as easy as pie unexacting uncomplicated self-explanatory unproblematic as easy as rolling off a log black and white unambiguous understandable transparent straightforward simple clear understanding accurate understanding as easy as falling off a log can be done with your eyes shut as easy as taking candy from a baby as easy as shelling peas as easy as can be as easy as breathing as easy as anything as easy as winking can be done with your eyes closed as simple as abc as easy as shooting fish in a barrel as easy as beans as easy as abc easy to understand plain perspicuous elementary easy distinct direct digestible diagrammatic comprehensible coherent clear-cut clear certain blow-off apparent evident explaining explanatory penetrable obvious