0 Old HSK word(s):
一笑了之* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

一 one / a, an / alone
笑 smile, laugh, giggle / snicker
了 to finish / particle of completed action
之 marks preceding phrase as modifier of following phrase / it, him her, them / go to
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual