Free.
Free
Free, gratis.
nothing
Word of mouth ! It costs nothing to tell someone of a great experience you had when (for example) you bought a new cooker.
Civility costs nothing means that politeness and kindness take little from you but give much.
it is actually saying that courtesy cannot be paid. It can only be made by you. It costs you nothing to be polite -- therefore, why should you be rude?
Nothing it costs nothing at all
nothing
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dew
The word for nothing is "nada". This means nothing, none.
Free Bee