Synonyms:
unbarred, unbolted, unlatched, unlocked, unsecured
Meaning: not firmly fastened or secured; "an unbarred door"; "went through the unlatched gate into the street"; "an unlocked room"
Usage examples
On this occasion, after twisting the card twice in his fingers, he signified to his attendant imp that he was visible; and the inner door was unbolted, and our friend announced.