quid pro quo - this for that⏎
quantum - how much⏎
quoad hoc - as to this⏎
per se - by itself⏎
quo warranto - by what warrant⏎
pro bono publico - for the public good⏎
pro bono - for good⏎
persona non grata - unwelcome person⏎
pro per - abbreviation of propria persona, meaning "one's own person"⏎