tứ vi 
four corners, all around [ tứ ] : (1) four; (2) idea, though (in literature)
[ vi ] : (1) to surround; (2) to act as; (3) small, subtle, delicate, tiny, micro; (4) to disobey; (5) (shark’s) fin
Most Common Compounds Set 1:
Most Common Compounds Set 2 :