Definition of "undependableness" []

• The trait of not being dependable or reliable (noun)

WordNet. Princeton University. 2010.

• "The older "Queen's knights" must have naturally felt her devotion to him; his "undependableness" -- in consequence not merely of his fits of madness but of his chivalrously permissible but very inconvenient habit of disguising himself and taking the other side -- must have annoyed the whole Table."