speak/think ill of somebody
speak ill of (someone or something)
To say malicious, objectionable, or defamatory things about someone or something. I've just always had the philosophy that it does no good to speak ill of anyone, so instead I direct that energy toward finding solutions to problems. Anyone who speaks ill of the government in this country runs the risk of being thrown in prison, or worse. You say we shouldn't speak ill of the dead, but we should never forget the misdeeds of those who were once in power, lest history repeats itself.
think ill of (someone or something)
To have a poor or disdainful opinion about someone; to hold someone or something in low regard or esteem. I hope they don't think ill of me for leaving my job so suddenly. I could tell the board thought ill of my proposal.
speak ill of someone
to say something bad about someone. I refuse to speak ill of any of my friends. Max speaks ill of no one and refuses to repeat gossip.