indecl. num. adj. eight . As adj., eclipses the initial of a follg. subst.: ocht n-aisli, Corm. Y 447. ocht n-aimsera, PH 6892 . o.¤ mbíastai, FA 21 ( LU 2147 ). o.¤ ngemma, FB 51 ( LU 8675 ). oct ṅdelbae ┐ oct ṅgné, Sg. 166a1 . ocht nduirn, Laws ii 238.10 . o.¤ clettíni, TBC-LL¹ 2556. iar forba ocht láa, PH 5658. o.¤ penginde, 3213 . o.¤ sillaba, Corm. Y 447. With art.: na hocht coire chenna the eight capital sins, PH 8033. celebrait na ocht trath, FA 7 ( LU 2010 ) = na hocht tratha, LB. na hocht sailm, Hib. Min. 4.125 . huanaib oct-sa from these eight (words), Sg. 90b8 . Absol.: cis lir lanamna docuisin la Feine? A ocht, Laws ii 344.2 (= Stud. in E. Ir. Law 3.10 ). a ocht deac ar chét (gl. cxviii), BCr. 32d2 . a hocht déc eighteen, MacCarthy 186 § 1. ocht ṁbliadna sescat sixty-eight , SR 2257. Multiplying a follg. numeral: ocht fichti, TBC-LL¹ 4944. ocht cét laéch, CRR 48. dá ṅ-ocht cét (= 1600), Fél. June 22 . In dates: i n-ocht Kalaind Mái the eighth day before the Kalends of May, PH 1438. i n-ocht Id Enair (i.e. January 6), 6920 .

Used in compds. (a) with noun, chiefly in names of metres: ¤bricht, IT iii 98 § 159. ¤chasbairdne, 89 § 115. ¤fichtech pertaining to the number 28; having 28 parts: ocht-fhichtech é, muna bisex in bliadhain, ocus mad bliadhain bisex is nai-fhichtech, MR 112y (of the zodiacal sign Aquarius). acht ginmótha oct-fichtech Feabra nama, MR 108.12 . ¤ḟochlach, IT iii 57 § 108 . ¤randaigecht, 80 § 54. ¤rindaird, 90 § 123. ¤slisiu: sleg ochtshlision 'a spear made from eight splittings of wood', BDC 106.44 .​ (b) generally with adjs. derived from nouns: ¤c[h]obradach `eight-bossed' (of a shield), CCath. 5313. ¤slisnech: do ochts[h]lisnig úindsend, MacCongl. 95.24 (as subst.). ¤ tairrngech (epithet of a steed), IGT Dec. ex. 730. ¤tédach having eight strings; as subst. ā, f. used of a musical stringed instrument: tall a ochttedaich mbic chuicci, ZCP v 500.10 .