This is the 2236th most frequent Chinese word.
盖
"盖" means "to cover," "lid," or "to build."
In this sentence, "盖" is used as a verb meaning 'to build or cover'.
我的家被盖在山顶上。
My house is built on the top of the hill.
Here, "盖" functions as a verb meaning 'to cover or conceal'.
我用被子盖住了自己。
I covered myself with a quilt.
In this context, "盖" refers to a noun meaning 'the cover or lid' of an object.