"Cleave" and "sanction" mean their opposite also. Any more such words in our language?

Question

Cleave unto your spouse and leave your parents. AND Cleave the rusted nut from that wheel rim.
Sanction was given to the test cheaters. AND Sanction was granted by the bishop.

Answer 1

Great question.



bolt to secure in place OR to dash away suddenly

clip to fasten together OR to cut apart

dust to clean OR to sprinkle with dust

weather to withstand OR to wear away



This type of word is called an auto-antonym or contronym or contranym. Also called antagonym, Janus word or self-antonym.



This idea is known as enantionymy or "antilogy.



Cheers!

Answer 2

Let is the only one that comes to my mind, meaning both allow and prevent (in old English, surviving in the legal phrase "without let or hindrance").

Answer 3

OFF: The alarm went off. The alarm is off