Why use ん here?


車は駐車場から出てきていったん止まりました. why use ん here? why dont' use ~ 出てきていって止まりました.




You're seeing a verb which does not really exist there.

[一旦【いったん】](http://dictionary.goo.ne.jp/leaf/jn2/13469/m0u/) is an adverb which
means "once", "temporarily", or "for a moment".

