imprevisto bedeutet auf Englisch

accidental▼(happening by chance)
adjective
[UK: ˌæk.sɪ.ˈden.tl̩] [US: ˌæk.sə.ˈden.tl̩]

unforeseen▼(not foreseen)
adjective
[UK: ˌʌn.fɔː.ˈsiːn] [US: ˌʌn.fɔːr.ˈsiːn]Insurance protects against unforeseen predicaments. = Los seguros protegen contra apuros imprevistos.

contingency [contingencies]▼(possibility; something which may or may not happen)
noun
[UK: kən.ˈtɪn.dʒən.si] [US: kən.ˈtɪn.dʒən.si]