This is the 296th most frequent Vietnamese word.
cũ
"Old" or "former."
Used to describe something that has aged or is not new.
Chiếc xe này đã cũ rồi.
This car is old.
Used to refer to someone one has known for a long time or a former relationship.
Tôi nhớ người bạn cũ thời học sinh.
I remember my old school friend.
Used to compare or indicate a former thing or state as superior or preferable.