Source: http://www.dil.ie/31981
Timestamp: 2019-04-20 10:40:10+00:00

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o, ā. adj. used chiefly of persons, apparently off one's head, demented, crazy , both of temporary condition due to excitement, intoxication, anger, etc., and of permanent quality; in heroic lit. applied to warriors (often in unfavour- able sense foolhardy, rash ); in Laws to the insane or half- witted. In late lit. often used in a complimentary sense spirited, lively, agile ; see IGT Dec. § 65 ( mear . . . ó chéill in mholta).
(a) Of persons: m.¤ .i. mo a ír .i. a ferg, Corm. Y 907. ? m.¤ quasi mur .i. imat . . . ar it imda na mera, 905 . mear .i. iarsinní bís a ænur isin allt a mbí .i. ina meracht ┐ ina ænur téit. quasi merulus .i. lon ... quod volat solus ┐ ni bí én aile cid dia cheniul féin ina coemtecht, Corm. 31 = mér, Corm. Y § 890 . mer .i. merulus .i. lon CIH ii 633.16 . fonrālaig mairb mesctha mir at our wit's end (?), SR 3579 (n p m. for a p.). dia n-essib cor bo m.¤ , Met. Dinds. ii 24. comdar mera mescda, YBL 138a28 . tibir cech m.¤ `every madcap is a laughing-stock', Tec. Corm. § 13.15 . drūth cech mer `recklessness is foolish', Ir. Proverbs 84.9 = Ériu ix 47 § 20 ( LL 147b39 ). cid dotgní m.¤, a mic legind? what drives you mad? Aisl. MC 47.28 . rogain mir `a madman's choice', Met. Dinds. iii 84. ni luadh mir (i.e. incredible statement), BR 170.4 . ra toebh leicne mer- laīch mhir, Moling § 18. gasruidh m.¤ active, spirited , Ir. Texts ii 33 § 18. nert sloigh láinmhir, IGT Dec. ex. 352. comhartha an mār-mir Macha `great warrior' (? madman), MR 226.12 . gníomh ainnirtag ollamh mhear `a crazy poet', Content. xxvii 5. Of women: in m.¤ mend (of Macha of Emain), Met. Dinds. iv 128 . don mnaí théithmir, ib. Compar. Midlúachair miriu cech maín ` sprightlier ', Met. Dinds. iii 282. ni ḟaca laoch . . . budh mōrrda is budh mire, LL 396.2 . fear fa mire is fa cliste san gcomhlann nimblest, fastest , Keat. Poems 209. is miride cruaidh fabhairt, steel is the nimbler for tempering, Dánfhocail 12 § 60.
(b) of the mentally deficient: oinmhit .i. m.¤ nó baeth, IT iii 276. fear fris ro scara[d] a cond .i. duine mear, Laws v 234. 28 Comm. na mir ┐ na hecodnaig, i 86.21 . cuimrech in duine mir (.i. fo tabur in dluighe fulla), 300.10 , 11 . cor mire contract of a mad woman, 52.2 . m.¤ gan rath (a class of `drúth'), H. 3.18 p. 423a ( O'C. 892 ).
(c) of animals: tarb maeth mer, Met. Dinds. iv 338. delb dhoim allaid . . . mhir, LB 124b1 = Keat. iii 2039. eascaire . . . inn aighi mir `mad cow', Laws iii 272.12 . Mide magen na marc mer spirited, mettlesome , Met. Dinds. ii 42. eich maithe meara, Cog. 112.5 .
(d) common epithet of sea: cusin muir m.¤ , LL 136a49 . Cog. 178.25 . tar tonnaib in mara mir, Lism. L. 3819. ar thonnuib mera in mara, Ériu ii 92.12 . fairge mhear, Keat. Poems 1462. mire 'náit na mōrthonda (of a chieftain), ZCP viii 221 § 48.
(e) of abstracts, actions, etc. wild, rash, precipitate, etc.: m.¤ is nír chond ceille in col, LL 33a38 . don mortlaid malar- tuind mir raging , 132b48 . Cath Glinne Mama is mór m.¤ , Cog. 112.18 . roga romer ` eager' (? extravagant, fantastic ), Met. Dinds. i 6. togla, tána, . . . áera, rúne romera `keen riddles' (? rash purposes or designs), iii 20 . Eochaidh mac R. an rūin mhir, LL 394.16 . ropo m.¤ a nnert, 33a41 . treb Beniamín co mbrig mir, LB 124b9 = Keat. iii 2047. uabhar mer, IGT Dec. ex. 880. ní rád m.¤ no wild (incredible) statement, LU 3035 , cf. ní m.¤ , ZCP viii 113 § 1. criss arcait, ni haicde m.¤ `no paltry (? hastily finished, scamped) work', Fianaig. 14.2 . imchosnam in míre mir `the contest for the coveted portion', Met. Dinds. iv 180 (epithet prob. transferred from imchosnam = the mad contest for the portion). matin mir, O'Mulc. 268 (`on a bright morning' < Lat. merus, Stokes; perh. wild, gusty ).
(a) with adj. forming a dwanda compd. or in adverbial relation: ¤amnas, ZCP viii 264 § 21. ¤borb, CCath. 5791. ¤calma 1928 . ¤dána 347 . ¤glé: gen mergle a scion bold and bright (?), LL 134b7 = Todd Nenn. 246. ¤trén, CCath. 1928. ¤uallach, SR 6686. With adj. formed from subst.: oclach . . . meardālach brisk in encounter, Cog. 170.19 . meardhuaiseach swift (impulsive) in bounty , Keat. Poems 738. mermenmnach, ZCP vi 32.12 . xiii 217.12 .
(b) with subst.: ¤ág ` furious battle ', Gorm. July 10. ¤aicme: mac Mugroin mir-aicme, LL 394.45 . ¤aichne: trí comartha tirdachta .i. immargal ┐ immarbág ┐ m. `mistaking one person for another (?)' (? muddle-headedness), Triads 229. Samhradh na meraithne . . . ni aithned neach caem nō cara ann `Summer of the Aberration', AU iii 130.6 , cf. FM iv 896. Finghin . . . do mharbhadh lá a bhráithribh tre mhearaithne by mistake , FM ii 1104.5 . ¤bhuinne Muaidhe swift stream, torrent , Ériu viii 135.28 . ¤cenn ` mad-head', epithet of sea: tar muir meircenn, Trip. 34.5 ; 448.21 (meircend). Lism. L. 302. meirceann .i. mear, O'Cl. ¤clann: tar merchlainn Ghaoidel, O'Gr. Cat. 456.13. ¤dánacht recklessness , Fianaig. 70.2 . merdhánacht (oppd. to críndacht), Luc. Fid. 143.14 . ¤dántas, id. O'Hussey TC 225. meardhortadh, TSh. 6636. ¤ghasradh, FM v 1652.9 . ¤gním a rash deed , Gorm. Apr. 14. ¤grád infatuation: (with obj. gen.) éd tre mer-grádh a mná, ZCP viii 108 z . mear-ghrádh na meirdreach, TSh. 5514. ¤gus: co m. garg, LL 137b16 . go m. dían, ZCP x 24.28 . co mēd meargosa, MR 136.24 . ¤laithe: i mmerlaithib errchaidib blustering days, Hib. Min. 66.36 . ¤lasad: a ṡúile ar merlasadh wildly flashing, Ériu v 180.300 . ZCP vi 278.27 . ¤línad: dochóidh gus an mbairille púdair . . . do merlíonadh a mhiosúr ` quickly (? rashly) replenish ', FM vi 2072. ¤ṡáile `brackish water', FM v 1626.7 . ¤scál: cland in merscáil móir (of Mile), ZCP xiii 364.2 , cf. Leb. Gab. i 176.11 . ¤tonn, RC xxix 142.2 . ¤tretell: in mertretill ┐ in rind agha (of Asca- nius), Aen. 2364.
(c) rarely with vb.: do merlabhair an muir talked wildly, raved , CF 736. ro merlasadur a shuili, ZCP vi 58.21 (see merlasad above).

References: § 65
 § 890
 § 13
 § 20
 § 18
 § 18
 § 60
 § 48
 § 1
 § 21