What is the meaning of Nach?

after, past (later in time)

after, behind (in sequence)

to, towards (with geographical names; see usage notes below)

according to; guided by

by the authority of; following

like (see usage notes below)

for

after, behind, later, next to

that...not .

not

isn’t...?/whether/if it is...

who/which isn’t...

still

yet

just

nor

after-party

some, any

alternative spelling of nách (“that (it) is not”)

Used together with the dependent form of a verb to form negative questions.

Used together with the dependent form of a verb to form negative subordinate clauses; that ... not

Source: wiktionary.org