unprepared
adj.not ready for something that is about to happen. You feel this way when you haven't done the work or planning needed for a task.
adj.not ready or equipped to deal with a particular situation or task. Often used predicatively after linking verbs like 'feel', 'seem', or 'appear'.
“I felt completely unprepared for the difficult exam.”
“The small coastal town was caught unprepared when the storm suddenly changed direction and intensified.”
“Entering the negotiations unprepared can lead to significant concessions that undermine the long-term viability of the partnership.”
Often followed by the preposition 'for' or a to-infinitive.
The adjective 'unprepared' collocations with 'for', not 'of'.
“They said this had left ministers locked in an unenviable task of persuading unprepared voters to cut welfare spending to fund defence.”
“The Australians were woefully unprepared for the breakout, despite receiving a warning that June from a Korean prisoner who’d overheard whispers of impending unrest.”
From un- + prepared.
From unprepare + -ed.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.