안

Noun

 * 1) inside
 * 2) interior
 * 1) interior

Etymology 2
Contraction of, ultimately from.

Adverb

 * 1) not

Usage notes
The related auxiliary verb is used to negate a clause, and has a more formal connotation. Compare:



Certain terms or expressions have a strong (sometimes obligatory) preference for one negation type or another. For example, adjectives derived from are usually negated by, as do inherently negative verbs such as  and. By contrast, negated rhetorical questions obligatorily require.

negates only the verb or adjective, whereas negates the entire embedded clause. While this difference is often not semantically meaningful, it can also lead to contrasting meanings, such as when the particle is involved:



In the first case, only the verb is negated. In the latter, the entire clause is negated.

Etymology 3
.

Noun

 * 1) idea, suggestion, opinion, thought
 * 2) plan, proposal, bill

Etymology 4
Korean reading of various Chinese characters.