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 (4) Other composite nominal prepositions are used as con- junctions in the Late Ma. period: o blegid Act. i 5> " 345 o herwydd i Cor. xv 53 ; o waith, in S.W. dial, waif A.

Conditional: (i) o, od 'if, Ml. W. o, ot, or', os 'if it is' ; ossit 'if there is'; o'm 'if... me'; o'th 'if...thee'; os ' if. . . him (her, them) ' ; oni, onid ' if. . . not, unless ', Ml. W. ony, onyt ; oni 'm 'if ... not. . . me ', oni-s 'if ... not. . . him (her, them) ', Ml. W. onym, onyx, etc. As above indicated the -* of os is either y& 'is', or else the 3rd sg. or pi. infixed pron. ; but in Late Mn. W. os came to be used instead of o, od for ' if simply ; examples are common in the i6th cent. : os rhoed Haw W.IL. 60.—o is followed by the spirant, also in Early Mn. W. by the rad., of jo-, i- t <?-, and by the rad. of other mutables ; od is used before vowels.

Before verbs : o chlywy Siaspat. . . o gwely flws W.M. 1 19-1 20 ' if thou hearest a cry ... if thou seest a jewel ' ; o chat D.G. 30 ' if thou shalt get ' ; o ca/do. 20 ' if I get ' ; od ey W.M. 446 ' if thou goest ' ; ot agory do. 457 'if thou openest'; with infixed pronouns: O'TH lleSi D.G. 59 'if thou killest me ' ; o'th gaf do. 524 ' if I may have thee'; os canyhatta W.M. 412 'if she allows him [to go]'; with r(y) : or bu do. 172 'if there has been ' ; or kaffaf i-yyhyvarws do. 459 'if I get my boon' ; or mynny IL.A. 165 ' if thou wilt '. Before nouns, etc., followed by the relative pron., os ' if (it) is' : Ac os wynteu &e me8 hi W.M. 190 'and if it is they who hold it'; os oS (read o'th) vo8 y gwney ditheu do. 429 ' if it is of thy free will that thou dost ' ; or followed by a simple subject : os pechawt hynny IL.A. 38 ' if that is sin '. Ml. W. ossit before an indef. subject : ossit a Sigrifhao. . . C.M. 27 ' if there is [any one] who enjoys. . .' The neg. forms ony etc. follow the rules for ny; before verbs : ony by& W.M. 95 'if there be not ' ; with infixed pron. : onys kaffaf do. 459 ' if I do not get it '. Before nouns etc. onyt ' if it [is] not ' : onyt edivar IL.A. 47 ' if not repentant'. This form became onyt, later onid, oiid ' but ' ; ny Seuthum i yma onyt yr gwellau vy mwcfoS S.G. 184'! have not come here but to amend my life ' ; ny mynnaf-i neb onyt Duw do. 178'! desire no one but God '. Instead of OS ' if it is ' we find before a past tense or bu 'if it was' in W.M. 458 (modernized to os in K.M. 104) : or bu ar dy gam y dyvuost ' if it was at a walk that thou earnest '. For oni a new os na is used in Recent W.

o ' if '< Brit, *a ' if ' 218 iii ; on the form see 71 i (2). ot may represent *a-ti or *a-ta, see 162 vi (2), which survives only before vowels. But an old ot before a cons., in which the -t is an infixed pron., survives in the stereotyped phrase ot gwnn W.M. 12 'if I know it'; this may well be *a tod ' if it '. o* ' if it is ' < *d 'iti ; ossit ' if there is ' < *a 'stlta < *d 'sti ita. The mutation after accented *a was the