(a method of, key to) secret writing

zero; nothingness

nothing

zero

not anybody; no person

unimportant person

(of un countable nouns and more than two people, thing) not any; not (even) one

not one thing

not anything

emptiness

small and weak

small, insignificant

a kind of small shellfish with many legs and a long tail, used as food

small, insignificant

not important

of no real worth, value

the figure 0; the point between the positive ( + ) and negative ( - ) on a scale, especially on a thermometer

nothing

zip

of no real worth, value