Daily Vocabulary(2021/09/23）

27496.critical(危機）a critical time or situation is serious and worrying because things might suddenly become much worse
She got into a serious car accident. Apparently she's in critical condition. 
27497.keep someone posted(随時連絡する）spoken to regularly tell someone the most recent news about something
The Internet is down. I'm looking into right now. I'll keep you posted.

27498.shoot someone an email(メールで連絡する） especially British English /food, paper etc that is no longer needed and has been thrown away 類義語 garbage, trash American English
If you have any questions, feel free to shoot me an email. 

27499.dwell on(物事をあれこれ深く考えたり心配したりすること）to think or talk for too long about something, especially something unpleasant 

Don't dwell on her. You'll find another girlfriend. 
27500.diligently(熱心に,勤勉に）someone who is diligent works hard and is careful and thorough 

I think she's doing great. She's a very diligent worker.