/ˈrɪɡər ˈmɔːrtɪs/ – Phrase
Definition: Tình trạng cứng cơ sau cái chết.
A more thorough explanation: when a body becomes stiff some time after death. In some case, the time that rigor mortis sets in can help a pathologist estimate the time of death
Example: The bodies were caked in mud and showed signs of rigor mortis.