số nghịch đảo 
inverse [ số ] : (1) amount, number, figure, quantity, size (of clothing), digit, edition; digital; (2) gear (of a car); (3) destiny, fate, lot
[ nghịch ] : (1) boisterous, hostile, rebellious, contrary, opposite, reverse; (2) to play with, tamper with, mess with
[ đảo ] : (1) isle, island; (2) to turn (over, around, etc.); (3) to pray for rain
Most Common Compounds Set 1:
Most Common Compounds Set 2 :