As a verb:
* The tight collar of his shirt began to chafe his neck. (meaning to irritate or rub raw)
* She chafed at the restrictions placed on her by her parents. (meaning to feel impatient or annoyed)
* The rough fabric chafed her skin. (meaning to rub against something and cause irritation)
As a noun:
* The constant chafe of the rope against the wood caused it to splinter. (meaning the act of rubbing or irritation)
* The chafe of the saddle on his horse's back caused a sore. (meaning a sore or irritation caused by rubbing)
Let me know if you'd like more examples or have any other questions!