What is the meaning of "out of which" in a sentence?
Recemtly I read a linguistic textbook and there is a sentence that I can't understand.

It says "The syntactic constituents of a phrasal expression are the smaller expressions out of which the phrase was contructed."

My question is what does "out of which" exactly mean in this sentence.

Question

What is the meaning of "out of which" in a sentence?
Recemtly I read a linguistic textbook and there is a sentence that I can't understand.

It says "The syntactic constituents of a phrasal expression are the smaller expressions out of which the phrase was contructed."

My question is what does "out of which" exactly mean in this sentence.

Answer

The sentence is saying that syntactic constituents are smaller expressions that make up a phrasal expression.

In English, you aren't suppose to end a sentence with a preposition.  So the author moved the words "out of" from the end of the sentence ("...smaller expressions which the phrase was constructed out of") and put it before "which."

Answer

hi. i think, out of which is similar with "from where"

im sorry if thats wrong