Sleep, nap (3)
I believe the answer is:
kip
I believe this is a double definition.
'sleep' is the first definition.
(I know that sleep can be written as kip)
'nap' is the second definition.
(I've seen this before)
(Other definitions for kip that I've seen before include "Sleep, nap (colloq.)" , "Sleep (sl.)" , "Short sleep" , "Snooze" , "Nap (slang)" .)