n ā, f. (bert). Also bertlach. Expld. as load, burden; chessboard: b.¤ .i. oire tromm nó fi[d]chell, O'Mulc. 178. b.¤ .i. aire no fidhchell, H 3.18, 64 b32 . beartrach .i. fithcheall no clar imirthe, O'Cl. As n. loc. dodechuid . . . do Bertlachaib aníar i mBertlachaib sair i n-inbiur Muáidi, Trip. 136.26 . a bBertlaig i mBertlaig Calrigi Culi Cernadan (= a Bertlacijs Occidentalibus, Colgan, Trias Thaum. p. 167, 251 n. 3 ), 250.11 . Cf. ad flumen Muaide de Vertrige in Bertrigam , ib. 327.15 ( Ardm. 15a1 ). O Floinn on Bheartraigh, Hy Fiach. 166.19 . B. bláith, 250.1 . brúgaid . . . na Bertraigi, 4 (see note).