Persona Non Grata: Unacceptable or unwelcome person
Example:Once I was cut out of the will, I became persona non grata among my relatives.
Post partum: After childbirth
Example: She was unconscious for an hour Post partum.
Post-mortem: Examination of a body after death; autopsy
Example: The post-mortem revealed that she had been murdered.
Prima Facie: At first sight, clear and evident
Example: Although her husband implored, 'I can explain!' the sight of another woman wrapped in his arms was prima facie evidence that he was a deceitful lout.
Prior: First, Primary, Priority
Example: Please make sure that you save all the information prior to closing the file.
Pro and con: For and against
Example: Evaluate all the pros and cons that you may have in future if you take this step.
Pro Bono: Done or donated without charge; free
Example: The lawyer's pro bono work gave him a sense of value that his work on behalf of the corporation could not.
Pro rata: Proportional; proportionally
Example: The car rental charge is $50 per day and then pro rata for part of a day.
Quid Pro Quo: Something for something; an equal exchange
Example: She vowed that when she had the means, she would return his favors quid pro quo.
R.I.P. (Requiescat in pace): Rest in Peace
Example: The Mughal kings made big tombs to Requiescat in pace.
Sine qua non: Indispensable element or condition
Example: Lemon is the sine qua non of this recipe.
Sponsor: One who accepts responsibility for another
Example: She was looking for a sponsor for her charitable organisation.
Status quo: The existing state or condition
Example: People with money are often content with their status quo.
Sui Generis: Unique
Example: Adjusting her pirate's hat and fringed hula skirt, Zelda sashayed into the party, knowing her fashion statement was sui generis.