without preparation; not prepared for; "unprepared remarks"; "the shock was unprepared"; "our treaty makers approached their immensely difficult problems unprepared"- R.E.Danielson
done or made using whatever is available; "crossed the river on improvised bridges"; "the survivors used jury-rigged fishing gear"; "the rock served as a makeshift hammer"
affect; "Fear seized the prisoners"; "The patient was seized with unbearable pains"; "He was seized with a dreadful disease"
take hold of; grab; "The sales clerk quickly seized the money on the counter"; "She clutched her purse"; "The mother seized her child by the arm"; "Birds of prey often seize small mammals"
take or capture by force; "The terrorists seized the politicians"; "The rebels threaten to seize civilian hostages"