Select the most appropriate one-word substitution for the given group of words. 

Killing of one's wife.

Uxoricide

The most appropriate one-word substitution for the killing of one's wife is uxoricide.

• Matricide is the killing of one's mother.
• Infanticide is the killing of a child.
• Paranormal means relating to or denoting events or phenomena that are beyond the scope of normal scientific understanding or explanation.

The word uxoricide is derived from the Latin words uxor, meaning "wife", and caedere, meaning "to kill". It is a relatively rare word, but it is the most specific term for the killing of one's wife.