As a noun racks
is plural of lang=en.
As a verb nacks is
third-person singular of nack.
racks
English
Noun
(head)
Anagrams
*
nacks
English
Verb
(head)
(nack)
Anagrams
*
nack
English
Verb
(
en verb)
(computing) To acknowledge negatively; to send a NAK signal to.