一会儿 can be translated to English as "a little while" or "a moment." It comes from the Chinese words 一 (yī), which means "one," and 会儿 (huìr), which means "moment" or "while." Here are some examples of how you can use this phrase in English:

Can you wait here for a little while? I need to run a quick errand.

Let's take a break for a moment and have some tea.

I'll be back in a little while. I'm just going to grab something to eat.

Here are the corresponding translations of these sentences in Chinese:

你能在这儿等一会儿吗？我需要去做点小事。

我们停一会儿，喝点茶。

我一会儿就回来。我去找点吃的。