My Left or Your Left?

I had a vague awareness of words that were their own opposites but didn't know there was a name for this puzzling conundrum. These somewhat confusing words are called contronyms. One example as indicated by today's title is the word left which can mean both depart and stay. I am going to list some other words that fall into this category for you to ponder at your leisure or bewilderment whichever suits you.
Dust
Seed
Stone
Trim
Cleave
Resign
Fast
Off
Clip
Screen
I think that is enough for most brains to work on for one day,enjoy!