insostenibile betyder på engelska

unsustainable▼(Not sustainable)
adjective
[UK: ˌʌn.sə.ˈsteɪ.nəb.l̩] [US: ˌʌn.sə.ˈsteɪ.nəb.l̩]

untenable▼(Not able to be held, as of an opinion or position)
adjective
[UK: ʌn.ˈte.nəb.l̩] [US: ʌn.ˈte.nəb.l̩]