sidussõnu
Sidussõnu is a term used in linguistics to refer to subordinate clauses that are grammatically dependent on a main clause. These clauses cannot stand alone as a complete sentence and serve to provide additional information, context, or modification to the main idea. They are often introduced by subordinating conjunctions such as "et," "kui," "kui et," "et kui," "sest," "et see," "mis," "kes," "kus," "kui," and relative pronouns.
In Estonian grammar, sidussõnu can function in various ways within a sentence. They can act as adverbial