unannounced
un-an-nounced
adjective
Not made known or revealed before it happens or appears.
"Her visit was completely unannounced."
Thesaurus
Synonyms: unpredicted, unexpected, unheralded
un-an-nounced
Not made known or revealed before it happens or appears.
"Her visit was completely unannounced."
Synonyms: unpredicted, unexpected, unheralded