Wind down

Example 1:
Mom 1: What time do your kids usually go to bed?
Mom 2: Hmm, around 8:30 or 9 pm the latest.
1: Wow, that's pretty good! How do you get them to bed so early? My kids fight and protest until about 10 pm.
2: Well, we limit screen time which means no phones or TV after 6 pm. A bath helps them wind down, too.
1: Oh that makes sense!  I will have to try those tips. Thank you!

Example 2:
Jake: Are you free on Saturday?
Luis: I might be, but I have a brunch with friends and I'm not sure what time that will end.
Jake: We're going to go see the new super hero movie that night. You should really try to join us. We're buying tickets in advance for the 7 pm showing.
Luis: I really want to see that! Can you get me a ticket? I'm sure the brunch will be winding down by around 3 pm. I should be able to make it.

Explanation:
In Example 1, wind down is used in the same way you would use the word relax.  A bath helps them relax, too.
In Example 2, wind down is used to signal the ending or closing of some event. I'm sure the brunch will be ending by around 3 pm.

Pronunciation: wind is pronounced liked wine, with the long i sound.

 https://languagesystems.edu/