Search and compare thousands of words and phrases in American Sign Language (ASL). The largest collection online.
How to sign: something that baffles understanding and cannot be explained
"how it got out is a mystery"; "it remains one of nature's secrets";
Similiar / Same: mystery, closed book, secret
Categories: perplexity
How to sign: a difficult problem
Similiar / Same: riddle, conundrum, brain-teaser
Categories: problem
