1 adjective impossible to maintainneamh-inbhuanaithe adj3it was financially unsustainablení raibh sé inbhuanaithe ó thaobh an airgid de2 adjective ECOL environmentally damagingneamh-inbhuanaithe adj3air travel is environmentally unsustainableníl an t-aerthaisteal inbhuanaithe ó thaobh na timpeallachta de3 adjective impossible to support, defendthis approach is demonstrably unsustainableis léir nach bhfuil aon dealramh leis an gcur chuige seoan unsustainable ideasmaoineamh gan dealramh