Bālk1, n.
(bawk), n. [A-S. balc, W. balc, a balk of land, a ridge between furrows, from W. balch, prominent, bal, prominence; A-S. balc, Ger. balken, beam. See BALCONY and BALK, v. t.]
Sense 1. A ridge of land left unplowed between furrows, or at the end of a field.
Bad plowmen made balks of such ground. Fuller.
Sense 2. A great beam, or rafter, or timber. “Tubs hanging in the balks.” Chaucer.
Sense 3. (Mil.) One of the beams connecting the successive supports of a trestle-bridge or bateau-bridge. [See Illust. of Bateau-bridge.]
Sense 4. A hinderance or disappointment. “A balk to the confidence of the bold undertaker.” South.