UNPREPARED

unprepared

(adjective) without preparation; not prepared for; “unprepared remarks”; “the shock was unprepared”; “our treaty makers approached their immensely difficult problems unprepared”- R.E.Danielson

Source: WordNet® 3.1

Etymology

Adjective

unprepared (comparative more unprepared, superlative most unprepared)

Not prepared; caught by surprise.

Noun

unprepared (plural unprepareds)

A black mark given to a pupil who arrives at a lesson without the necessary items or preparation.

Source: Wiktionary