unannounced
SEASON OF TELEVISION SERIES
Stress (The Unit); 200th Hour; Non-Permissive Environment; Security (The Unit); Dedication (The Unit); SERE (The Unit); Eating the Young; Unannounced; Exposure (The Unit); Morale, Welfare and Recreation (The Unit); The Wall (The Unit); 200th hour; Morale, Welfare and Recreation (TV episode); True Believers (The Unit)
If someone arrives or does something unannounced, they do it unexpectedly and without anyone having being told about it beforehand.
He had just arrived unannounced from South America...
My first night in Saigon I paid an unannounced visit to my father's cousins.
ADJ: usu ADJ after v, ADJ n, also v-link ADJ