sambut welcome someone, usher in ( a new year), celebrate a festival (like Christmas or Chinese New Year).

     menyambut welcome usher in, celebrate. (With men- in front that means it's a more formal way of speaking.) 

Mereka menyambut Hari Krismas pada Ahad lepas.

They celebrated Christmas last Sunday.   

     disambut be welcomed, be ushered in, be celebrated. (The di- in front means it is like a passive form in English.)

Hari Natal akan disambut di rumah ibu b...