If lurking beneath each use of "nice" --
eg nice guy, nice time, have a nice day -- we learn that the etymology is...
nice
late 13c., "foolish, stupid, senseless,"
from O.Fr. nice "silly,foolish," from L. nescius
"ignorant," lit. "not-knowing," from ne-"not"
(see un-) + stem of scire "to know."
Well, it could change our understanding of hearing
and using it.