an toàn mặt trước 
frontal security [ an ] : (1) peace, safety, security, safe, secure; (2) saddle
[ toàn ] : all, entire, whole
[ mặt ] : (1) right; (2) face, surface, dial; (3) side, aspect
[ trước ] : before, in front, previously; faced with, in the face of, ahead of
Most Common Compounds Set 1:
Most Common Compounds Set 2 :