Should be anything or nothing (5)
I believe the answer is:
ought
I believe this is a triple definition!
'should be' is the first definition.
(I've seen this before)
'anything' is the second definition.
(dialect term for 'anything')
'or' acts as a link.
'nothing' is the third definition.
(I've seen this before)
(Other definitions for ought that I've seen before include "Strange thing" , "Has a duty (to do something)" , "Should, had, better" , "Have/has a duty (to do)" , "Be logically necessary" .)