How do you spell Irish

Available Definitions:
1)  a. - Of or pertaining to Ireland or to its inhabitants; produced in Ireland.
2)  n. sing. & pl. - The natives or inhabitants of Ireland, esp. the Celtic natives or their descendants.
3)  n. sing. & pl. - The language of the Irish; the Hiberno-Celtic.
4)  n. sing. & pl. - An old game resembling backgammon.