Open unbreakable Synonyms

Definitions for Open

(adjective) allowing passage without obstruction
(adjective) freely available for use or participation by all
(adjective) being in a situation where one is likely to meet with harm

OU abbreviation

OU is an abbreviation for Open Unbreakable

What does OU stand for?

OU stands for "Open Unbreakable"

Unbreakable replaced

Definitions for Unbreakable

(adjective) impossible to break especially under ordinary usage