unprepared

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

without preparation;
not prepared for (Freq. 2)
- unprepared remarks
- the shock was unprepared
- "our treaty makers approached their immensely difficult problems unprepared"- R.E.Danielson
• Ant:
prepared
• Similar to:
ad-lib, extemporaneous, extemporary, extempore, impromptu,
offhand, offhanded, off-the-cuff, unrehearsed, spur-of-the-moment
• See Also:
unready