What is a word that begins an adverbial clause?

A Word that begins an adverbial clause is a subordinating conjunction. Examples include "because," "although," "if," and "when." These Words introduce the clause and provide information about time, reason, condition, or contrast in relation to the main clause. For instance, in the sentence "I will go for a walk if it stops raining," "if" introduces the adverbial clause "if it stops raining."