What is the meaning of Nach?

after, past (later in time)

after, behind

to, towards

according to, in accordance with (following the lead of a preference, order, etc.)

according to (quoting claims made by another)

by the authority of; following

like

for

Separated form of nach-

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