11-Letter Words with _,B,D,D,E,L,N,U

• without doubt; certainly

• Incapable of being algorithmically decided in finite time. For example, a set of strings is undecidable if it is impossible to program a computer (even one with infinite memory) to determine whether or not specified strings are included.

• (of a WFF) logically independent from the axioms of a given theory; i.e., that it can never be either proved or disproved (i.e., have its negation proved) on the basis of the axioms of the given theory. (Note: this latter definition is independent of any time bounds or computability issues, i.e., more Platonic.)

• Any of several species of large shrubs or small trees, of the genus Staphylea, in the family Staphyleaceae

• Diospyros whyteana, a species of tree with edible fruit, native to Africa