This is the 16218th most frequent Korean word.
붙이자
"붙이자" means "Let's attach" or "Let's stick."
붙이자 is used here in the sense of attaching something to a surface.
이제 포스터를 벽에 붙이자.
Let's attach the poster to the wall.
붙이자 indicates the action of adhering or sticking one object to another using an adhesive medium.
튼튼한 접착제를 사용해서 물건을 붙이자.
Let's use a sturdy adhesive to stick the item.
붙이자 conveys the sense of adding something to enhance or complete a context.