_Omnia bona bonis._—All things are good with the good. _Omnia vincit amor._—Love conquers all things. _On-dit._—A rumour; a flying report. _Onus._—Burden. _Onus probandi._—The responsibility of producing proof. _Ope et consilio._—With assistance and counsel. _Ora et labora._—Pray and work. _Orator fit, poeta nascitur._—The orator is made by education, but a poet must be born. _Ore rotundo._—With full-sounding voice. _Otium cum dignitate._—Dignified leisure. _Outré._—Preposterous; eccentric. _Oyer and Terminer._—A criminal court. _Pallida mors._—Pale death. _Par excellence._—By way of eminence. _Par nobile fratrum._—A noble pair of brothers; two just alike. _Pari passu._—With equal step; in the same degree. _Parole d’honneur._—Word of honour. _Pars pro toto._—Part for the whole. _Particeps criminis._—An accomplice. _Parturiunt montes, nascetur ridiculus mus._—The mountains are in labour; a ridiculous mouse will be brought forth. _Parva componere magnis._—To compare small things with great. _Parvenu._—A new comer; an upstart. _Pas._—A step; precedence. _Passe-partout._—A master-key. _Passim._—In many places; everywhere. _Paterfamilias._—The father of a family. _Pater noster._—Our Father; the Lord’s prayer. _Pater patriæ._—Father of his country. _Patois._—A provincial dialect. _Pax in bello._—Peace in war. _Peccavi._—I have sinned. _Penchant._—An inclination; a leaning toward. _Pendente lite._—While the suit is pending. _Penetralia._—Secret recesses. _Per aspera ad astra._—Through trials to glory. _Per capita._—By the head; equal division. _Per cent._ or _per centum_.—By the hundred. _Per contra._—Contrariwise. _Per curiam._—By the court. _Per diem._—By the day. _Per fas et nefas._—Through right and wrong. _Per saltum._—With a leap; at once. _Per se._—By itself; alone. _Perdu._—Lost. _Père de famille._—The father of a family. _Petit._—Small; little. _Petitio principii._—A begging of the question. _Petit-maître._—A fop. _Peu à peu._—Gradually; a little by little. _Pinxit._—Painted it: placed after the artist’s name on a picture. _Più._—More. _Plateau._—A plain; a flat surface. _Plebs._—Common people. _Pluries._—Very often; a third writ, after two writs have issued. _Poco._—A little. _Poeta nascitur, non fit._—A poet is born, not made. _Point d’appui._—Point of support; prop. _Poisson d’Avril._—April fool. _Populus vult decipi._—People like to be deceived. _Posse comitatûs._—The power of the county. _Postea._—Afterward; endorsement of the verdict upon the record. _Post mortem._—After death. _Postulata._—Things assumed. _Præcognita._—Things previously known. _Præmonitus, præmunitus._—Forewarned, forearmed.