(/bəˈmjuːzɛd.li/)
Adverb
1. In a confused, perplexed or bewildered way
WALTER
“Take the ringer. I’ll drive.”The Dude takes the briefcase and slides over.
DUDE
“The what?”WALTER
“The ringer! The ringer, Dude! Have they called yet?”The Dude opens the briefcase and paws bemusedly through it as the car starts rolling.
DUDE
“What the hell is this?”WALTER
“My dirty undies. Laundry, Dude. The whites.”
From the post: English Vocabulary from the movie “The Big Lebowski”
Source: Big Lebowski, The Script at IMSDb. (imsdb.com)