undisclosed - concealed, hidden, not made known⏎
revoke - cancel, not retain, end validity of⏎
vanilla - ordinary, not special⏎
zero hour - departure, beginning (of operation)⏎
retrieve - find, recoup, get something back⏎
schedule - timetable, plan, list⏎
valid - genuine, legally or officially acceptable⏎
rise - ascend, increase in amount or level⏎
strategic - planned⏎
sole - only, one⏎