Definition from Wiktionary, the free dictionary
This form is used independently, not with a noun that it modifies. It is always preceded by the particle a.
- a ceathair, a cúig, a sé ― four, five, six
- bus]] a ceathair ― bus number four
- a ceathair a chlog ― four o’clock
- ceathrar (used to modify a noun referring to human beings)
- ceithre (used to modify a noun not referring to human beings)