Tanning. [immediate source doubtful; cf. Sw. beta to tan, G. beiszen to steep in lye, to macerate, also to BAIT v.1 (with which it is cognate).] To steep in bate: see BATE sb.5

1

1875.  Ure, Dict. Arts, III. 89. The liming and bating, or the unhairing and cleansing.

2

1879.  Jamieson, Bait, to steep skins in a ley made of hens’ or pigeons’ dung, for the purpose of reducing them to a proper softness.

3