indecl. adj. (cf. 1 airches) meet, fitting, right , used as pred. with cop. oirches a rim . . . for oen-la na féli sin 'tis meet to reckon those feasts on the same day, Fél. 212 z . féach an oircheas a aithches if it be right to repudiate him, Content. iv 20 . ní hoircheas ar n-éara it beseems not to deny me, A. Ó Dálaigh iv 6 . náchar fhoircheas an athchuinge do iarraidh, Atlantis iv 200.23 . is o.¤ dom it is meet for me, I ought: ni bud oirc[h]es dún ar n-ór do thabairt, Mer. Uil. 107 (oircis v.l.). tocht tairsu is oirches d'eicsibh, LL 394.39 . ni hoirces damhsa an t-ór so do ghabail, BNnÉ 233.3 . dob oircheas do gach n-aon dícheall do dhéanamh, TSh. 4957. compar. ní hairchisi th'opar . . . andá opar in lochta, etc., LU 4351 (word inserted on an erasure by H, text by M). dob oirchisi duit-si subhal- taighe do denamh inā tursi, BNnÉ 49.5 . Rarely as attrib.: ascaidh oirches , SG 24.31 . druis oirc[h]es lawful lust, ACL iii 235 § 23 . As subst. o, m.: oircheas imbuailte `becoming victory', MR 254.24 . ag tagra i n-aghaidh oirchis `arguing against all right', Content. xviii 87. Adv. mairg era mbi a maith ġa mess | muna chaith hi cu hoirchess, LB 10 m. inf.