elapse

Time doesn't stand still, does it? It elapses, meaning it passes, slips by, or moves on. Think of a deadline getting closer; as the hours elapse, you realize it's nearly too late. Or imagine watching a gripping movie: two hours elapse before you even think to check your phone.

"Elapse" is used almost only for time. It is a little more formal than simply saying "pass," so you will often see it in legal writing, reports, and careful prose. Whether it is seconds, days, or centuries, when that period of time goes by, it elapses.

To elapse means to pass or go by, and it is used specifically for time. It often points to the duration between two events or to a period that has gone by. For example: "Four years elapsed between her graduation and the start of her medical residency." In other words, that whole stretch of time passed.

Unlike words used for sudden actions, "elapse" usually suggests a stretch of time. It can be used for short periods, but it is more common with clearer spans such as minutes, hours, months, or years. An afternoon might easily elapse while you are lost in a good book.

The word comes from the Latin elapsus, meaning "to slip away." That origin fits its feel well: it is not just about time moving, but about time quietly slipping past. People sometimes confuse it with "lapse," but "elapse" is an intransitive verb used for time itself. You say that time elapses or that an hour elapses; you do not usually say that a person elapses something. For example: "If too much time elapses, the offer will no longer be valid."

So, whether you are describing the slow passage of decades in a history book or the minutes ticking away during an exam, to elapse is to slip away gradually and inevitably with the flow of the clock.