insolvable unsoluble unsolvable unresolvable
insolvable%5:00:00:insoluble:02 unsoluble%5:00:00:insoluble:02 unsolvable%5:00:00:insoluble:02 unresolvable%5:00:00:insoluble:02
nerazrešljiv nerešljiv neuganljiv
not easily solved
an apparantly insolvable problem public finance...had long presented problems unsolvable or at least unsolved (C.L.Jones)