
1) Ad hoc 2) Ad lib 3) Ad-lib 4) Extemporaneous 5) Extemporary 6) Extempore 7) Extemporized 8) Immature 9) Impromptu 10) Improvised 11) Not on the alert 12) Not prepared for 13) Not ready 14) Off the cuff 15) Off-guard 16) Offhand 17) Offhanded 18) Spontaneous 19) Unarranged 20) Undeveloped 21) Unplanned
Found on
https://www.crosswordclues.com/clue/unprepared

1) Extemporaneous 2) Extemporary 3) Extempore 4) Impromptu 5) Offhand 6) Offhanded 7) Raw 8) Spontaneous 9) Unready 10) Unrehearsed
Found on
https://www.crosswordclues.com/clue/unprepared

[
adj] - not put in a state of preparedness 2. [adj] - without preparation 3. [adj] - lacking with intellectual equipment
Found on
http://www.webdictionary.co.uk/definition.php?query=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
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.