Англо-русский словарь Мюллера
rot away гнить, портиться The soil in the forest is rich with dead leavesand branches that have been rotting away for centuries. His teeth had rottedaway and were black at the edges.
Большой англо-русский и русско-английский словарь
гнить, портиться The soil in the forest is rich with dead leaves and branches that have been rotting away for centuries. ≈ В этом лесу богатая почва, листья и ветви гнили тут веками. His teeth had rotted away and were black at the edges. ≈ У него сгнили все зубы и почернели по краям.