insubmergible
adjective
in·submergible
variants or insubmersible
"+
: incapable of sinking
Word History
Etymology
insubmergible from in- entry 1 + submerge + -ible; insubmersible probably from French, from in- in- entry 1 + Latin submersus (past participle of submergere to submerge) + French -ible