n o (s), n. (vn. of for-toing) over-swearing ; making an over-riding oath ; assigning liability ( Críth G. p. 99 ) : cid f.¤ cid dithech confirming or disproving oath Cóic Con. § 62 . imusfrecrat ... a f.¤ ┐ a ndithech proof and denial (of kings and poets) confirming or disproving Laws iv 354.19 . dég ḟortaig nó díthig for the sake of, etc. Críth G. 8 ( Laws iv 298.9 ). do fortuch [leg. fortacht ?] do duinib, Laws i 268.1 . ni tualaing [ben] luighe na fortuigh for nech, H 3.17, 431.10 ( O'D. 531 ). it grada eclasa dogniat imdenam na ngrad n-ecalsa eile dia saraigther ┐ is leo d ano f.¤ inna ndiaid, H 3.18, 438a ( O'Curry 1056 ). fer fortaig snāthaiti the man who attests [up to the value of] a needle Cóic Con. § 61 .

Cf. do fedhar fir a fortaib flatha .i. do fairgiter conadh lais na firflathaib fortach for a memradh, H 3.18, 243b16 ( O'Curry 458 ).

Also a person (category) qualified to give over-riding testimony: f.¤ dona hocht fortaigib coitcinna .i. eclais for tuaith, no cenn for memur, no innraic for eisinnraic ..., H 3.18, 294 ( O'Curry 598 ). doberait fír folad [folta ?] hi fortachaib flatha, H 3.18 247 ( O'Curry 473 ). ní ba ráith friot fer fola ... na sinserais. arnab f.¤ for chró duit re n-aimsir tobhaigh for bíu, Ériu xiii 29.8 = xi 73 § 6 (fortaidh).