 The words "kyllä" and "ei" are often shown in dictionaries as being equivalent to 'yes' and 'no', but the situation is a little more complicated than that.The typical response to a question which in English is answered 'yes' or 'no' is, as we see above, more usually answered by repeating the verb in either an affirmative or negative form in the appropriate person.The word 'kyllä' is rather a strong affirmation in response to a question and is similar to the word 'niin' which is an affirmation of a response to a statement of fact or belief.