A subordinating conjunction is a DMW. Subordinating conjunctions are conjunctions that subordinate one part to another part (as opposed to a coordinating conjunction). Usually, we see them subordinating a dependent clause to an independent clause.
Typically, any dependent clause that has a subordinating conjunction for its DMW will be adverbial. The counterpart of a subordinating conjunction is a relative pronoun (both are DMWs). more
Greek:
The most common subordinating conjunctions in Greek are οτι, ινα, εαν, ει, καθως, ως, γαρ, οπου, διοτι, and οτε.
Hebrew:
In Hebrew, the conjunction כי is often used as a subordinating conjunction.