condolence

a missive of condolence;

express one's condolence to

Please accept our sincere condolences.

we offer our sincere condolences to his widow.

We extended our condolences to the bereaved family.

Please accept my condolences on your mother's death.

Please accept my condolences on your mother’s death.

We would like to take this opportunity to convey our heartfelt condolences to the families of the victims.