Doesn't is the contraction of does not. It is used to form the negative of the verb "does" in the present tense.
The contraction doesn't is common in spoken and informal written English. It helps to express negation more naturally and succinctly than the full phrase "does not."
"Doesn't" simplifies negative statements while keeping the meaning clear and direct.
Author's summary:
The word "doesn't" is a widely used contraction of "does not," essential for forming negative sentences clearly and naturally in everyday English.