This is the 8429th most frequent Russian word.
накройте
"Set", "cover", or "lay" (used as an imperative).
In this sentence, "накройте" is used in the context of preparing the table with necessary items for dinner.
Накройте стол перед ужином, пожалуйста.
Set the table before dinner, please.
Here, "накройте" conveys the act of covering the child with something to provide warmth.
Накройте ребёнка тёплым одеялом, чтобы он не замёрз.
Cover the child with a warm blanket so they don't get cold.
In this example, "накройте" is applied to the action of protecting the garden by covering it with a film.