Lenition is used to ease the flow of speech. It was originally used when there was a consonant between two vowels, one ending and one beginning a word. as well as as when a consonant was between two vowels within a word. Feminine nouns are lenited after the article "an" because "an" used to be "sinda" when it was shortened to "an" the lenition was retained, so that is why feminine nouns are lenited after "an" Masculine genitive singular and masculine possessive pronoun require lenition. Feminine adjectives & nouns are lenited "ceist"is a feminine noun of the second declension, so why is it not lenited? tá ceist agam.....the consonant c is between two vowels and the word is feminine so why is it not lenited? Is it because it is not genitive? Where did I go wrong?