170. Very frequently in modern times the particle as (=agus) is used instead of is in numbers. As in numbers is pronounced iss.
171. A dó and a ceaṫair can be used only in the absence of nouns. If the nouns be expressed immediately after "two" and "four," dá and ceiṫre must be used.
172. Aon, one, when used with a noun almost always takes the word aṁáin after the noun; as, aon ḟear aṁáin, one man. Aon by itself usually means “any;” as, aon ḟear, any man; aon lá, any day. Sometimes aon is omitted and aṁáin only is used, as lá aṁáin, one day.
173. Under the heading "Ordinals" two forms will be found for nearly all the smaller numbers. The forms given first are the ones generally used. As the secondary forms are often met with in books, they are given for the sake of reference. Céad, first, is used by itself, but aonṁaḋ is used in compound numbers, such as 21st, 31st &c.
First, as an adverb, is ar d‑tús or ar d‑túis, never, ceud.
174. The d of dá two is always aspirated except after a word ending in one of the letters, d, n, t, l, s, or after the possessive adjective a, her.
The words for 30, 40, 50, 60, 70, 80, 90, given in brackets, are the old words for these numbers; they are not used now, and are given simply for reference.
