käytettiinkö
Käytettiinkö is a Finnish word that functions as a past passive interrogative form. It translates most directly to "was it used?" or "were they used?". The root of the word is the verb "käyttää," meaning "to use." The "-ttiin" ending signifies the passive voice in the past tense, indicating that an action was performed on the subject. The "-kö" ending converts the statement into a question.
Therefore, "käytettiinkö" is used when inquiring about whether something was utilized or employed in the past.