unshut
Left standing ajar
Unshut means not closed or to open.
The word is rare, appearing mainly in literary or archaic contexts: The door stood unshut.
As a verb, to unshut is to open something that was closed: She unshut the window to let in air.
The more common alternatives are open or unclosed.
ajar
Partially open
unsealed · unbarred · unfastened · unbolt · unhook · unclasp · unpin · unscrew · unstrap · untie
disclose
Reveal hidden information
unearth · divulge · bare · show · lay open · bring to light · uncover · unseal · unwrap · open up
open
Not closed
inaugurate · embark · activate · trigger · dawn · outset · onset · kickoff · start up · set in motion