null

nouns

a quantity of no importance
"it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"
aught, cipher, cypher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo

adjectives

lacking any legal or binding force
"null and void"
null, void
is derived from
nullity