Definitions

1. adjective

not thought out or planned in advance; unplanned or unprepared

“The company’s undevised response to the crisis led to a lot of unnecessary damage.”

2. noun

something that has not been planned or thought out; an unplanned or unprepared state

“The situation was a result of their undevised actions.”

3. verb

to plan or prepare something hastily or without careful consideration

“They undevised a plan to deal with the unexpected situation.”