a. [f. prec. + -ABLE.] That may be exceeded.
Todds explanation, copied into mod. Dicts., is due to a misunderstanding of Fr. surmontable in Sherwood.
1611. Cotgr., Surmontable surpassable, exceedable.
Hence 1632. in Sherwood.
1819. Todd, Exceedable, That may surmount or excel [with reference to Sherwood]. Hence in mod. Dicts.