Two-sided impenetrability Synonyms

Definitions for Two-sided

(adjective) having two sides or parts
(adjective) capable of being reversed or used with either side out

TI abbreviation

TI is an abbreviation for Two-sided Impenetrability

What does TI stand for?

TI stands for "Two-sided Impenetrability"

Definitions for Impenetrability

(noun) the quality or state of being impossible to know, understand, or explain
(noun) the quality of being impenetrable (by people or light or missiles etc.)
(noun) incomprehensibility by virtue of being too dense to understand