1. incapable of being passed, traveled, crossed, or surmounted
2. impossible to pass, cross, or travel over
3. impossible to pass, cross, or travel … the forest road … led to impassable marshes where the paths had long been lost. — J. R. R. Tolkien, The Hobbit
impassably 例句
英汉例句
They were jokingly dusty in? dry weather and impassably muddy in the rain.