This is the 13789th most frequent Russian word.
новосельем
"Новосельем" means "housewarming" in English.
The word 'новосельем' is used to denote the celebration or event of a housewarming here.
Мы отметили новосельем переезд в новый дом.
We celebrated our moving into a new home with a housewarming.
In this sentence, 'новосельем' refers to the occasion or event that coincides with the housewarm gathering.
Новосельем было решено провести семейное собрание.
The housewarming was decided to host a family gathering.
Here, 'новосельем' illustrates the feeling or sentiment associated with the housewarming event.