How do you say my in Irish Gaelic?

The word for "my" in Irish Gaelic depends on the noun it modifies and its grammatical gender and number. There isn't one single word.

Here are some examples:

* Mo: This is the most common form, used before a noun starting with a consonant. For example: mo chara (my friend).

* M' (or Ma'): This is a shortened form of "mo" used before a noun starting with a vowel. For example: m'athair (my father)

There are also variations depending on the case (nominative, accusative, genitive, etc.). But for most everyday uses, mo and m' are the forms you'll need.