passing
adjective
noun
1 the passing of time has done little to improve the situation:
passage, course, progress, advance, process, flow.
2 it was with much regret that I learned of Jack's passing | the passing of “traditional” art:
death, demise, passing away, passing on, end, expiry, loss, expiration, decease;
disappearance, vanishing, dying out;
rare quietus.