Unexplained impossibilities Synonyms

Definitions for Unexplained

(adjective) not explained
(adjective) having the reason or cause not made clear

Synonyms for phrase

inexplicable difficulty

inexplicable failure

strange failure

unknown difficulty

mysterious failure

UI abbreviation

UI is an abbreviation for Unexplained Impossibilities

What does UI stand for?

UI stands for "Unexplained Impossibilities"