0 Old HSK word(s):
海陆空军* *

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

海 sea, ocean / maritime
陆 land, continental / army
空 empty, hollow, bare, deserted
军 army, military / soldiers, troops
Hsk Characters:
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual