This is the 2929th most frequent Russian word.
входом
The Russian word "входом" means "entrance" or "entry" (instrumental case).
The word "входом" is used in its instrumental case, indicating the location relative to which the action is taking place.
Мы встретились перед входом в музей.
We met in front of the entrance to the museum.
Here, "входом" is part of a descriptive phrase, providing additional information about the type of door.
Администратор открыл дверь с входом в здание.
The administrator opened the door with the entry to the building.
In this sentence, "входом" defines the means by which the action was performed, again in the instrumental case.