ngũ hành 
the five basic elements (metal, wood, water, fire, earth) [ ngũ ] : five
[ hành ] : (1) scallion, spring onion; (2) to act, execute, carry out; (3) stem; (4) to go, travel (on foot); (5) one of the five elements
Most Common Compounds Set 1:
Most Common Compounds Set 2 :