without a clue

baffled bewildered clueless doubtful mystified perplexed rattled

bollixed discombobulated floored lost nonplussed shook stuck stumped thrown

at a loss at sea come apart come unzipped dopey foggy fouled-up hung up in a fog loused up messed-up mind-blown mixed up mucked up screwed-up shook-up spaced out unglued

clear

aware certain cognizant sure