of course - certainly, definitely, naturally "Of course you can use my car if you want to." of interest (to someone) - to be interesting to someone The man who works at the gas station is of interest to the police in their investigation of the murder. of late - lately Of late there has been almost no rain in our city. of no avail - with no effect, unsuccessful My complaints to the company were of no avail and nothing was done. of one's own accord/free will - by one's own choice The supervisor decided to leave her job of her own free will and was not fired. of.
