زالَ: اِخْتَفَى، اِنْقَضَى to disappear, vanish, clear (away) , go (away) ; to abate; to cease to exist; to end, come to an end, terminate

ما زالَ، ما يَزَالُ، لَمْ يَزَلْ، لا يَزَالُ still, yet; to continue to be; to continue to do, go on doing, keep doing