0 Old HSK word(s):
航空挂号* *

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

航 sail / navigate / ship, boat
空 empty, hollow, bare, deserted
挂 hang, suspend / suspense
号 mark, sign / symbol / number
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual