kiihdyttäisivät
The Finnish word "kiihdyttäisivät" is the third-person plural conditional form of the verb "kiihdyttää". The verb "kiihdyttää" generally means to accelerate, to speed up, or to intensify something. Therefore, "kiihdyttäisivät" translates to "they would accelerate", "they would speed up", or "they would intensify".
This specific grammatical form indicates a hypothetical or conditional action in the past or future. It suggests