without saying; not
Used in negative constructions to mean 'without saying' or 'not'. Often appears in phrases like 何と言わず (without saying anything).
He left the room without saying anything.
whether ... or ...; be it ... or ...; ... as well as ...
Used in the pattern AといわずBといわず to mean 'both A and B' or 'whether it's A or B'. Emphasizes that the statement applies to all mentioned items.
My whole body hurts, whether it's my hands or my feet.
He's always working, day and night.