täyttäsi

The Finnish word "täyttäsi" is the conditional past tense, third-person singular form of the verb "täyttää". The verb "täyttää" has several meanings, including to fill, to fulfill, to complete, or to satisfy. Therefore, "täyttäsi" translates to "would have filled," "would have fulfilled," "would have completed," or "would have satisfied," depending on the context in which it is used.

For example, if someone were discussing a past event where an action could have completed a task, they might say "Hän olisi täyttäsi tehtävän" which translates to "He/She would have completed the task." Another example could be in the context of a wish or a hypothetical situation: "Jos hän olisi tullut, hän olisi täyttäsi lupauksensa" meaning "If he/she had come, he/she would have fulfilled his/her promise." The precise English translation is highly dependent on the preceding clause and the overall meaning of the sentence. The conditional past tense in Finnish indicates a hypothetical or counterfactual situation in the past.