a. rare. [f. SUBMERGE + -IBLE.] = SUBMERSIBLE.
1870. Daily News, 18 Oct., 2/2. The proposal to build a high-sided ship submergible in action I hold to be unsound.
So Submergibility.
180212. Bentham, Ration. Judic. Evid. (1827), I. 130. Partaking in respect of submergibility of the nature of a ferry boat.