All

coup de grace

(french) a death blow [literally, a blow of mercy]

cum laude

(latin) with honors [lowest of three honors - summa and magna]

double- entendre

(french) a double meaning; used to express two meanings, especially when one is risque

en rapport

(french) in sympathy, accord, or agreement

esprit de corps

(french) a common spirit of devotion among members of a group

par excellence

(french) being an example of excellence; superior

qui vive

(french) who goes there?

potpourri

(french) a mixture of species/flowers kept in a jar for fragrance; any mixture of items

faux pas

(french) a slip or blunder in etiquette, manner; a social blunder

savoir- faire

(french) knowledge of what to do in any situation; tact

tete-a-tete

(french) a private conversation between two people

nouveau riche

(french) a person newly rich

laissez faire

(french) the theory that government should intervene as little as possible

entree

(french) a dish served as the main course; making an entrance

elan

(french) a dash; impetuous ardor

coup d' etat

(french) a sudden action resulting in a change of government

hors d'oeuvres

(french) appetizer; a bit of food before a meal

bon appetite

(french) [I wish you] a hearty meal

c'est la vie

(french) that's life; such is life

cogito, ergo sum

(Latin) I think; therefore, I am. [Descartes first principle to resolve universal doubt]

e pluribus unum

(Latin) out of many, one; in unity we have strength [motto of the USA]

ex libris

(Latin) from the library; inscription on a book plate

requiescat in pace

(Latin) many he/she rest in peace

simper fidelis

(Latin) always faithful [motto of the US marine corps]

status (in) quo

(Latin) the existing state or condition

veni, vidi, vici

(Latin) I came, I saw, I conquered [Julius Caesar]

voila

(french) used ti express success or satisfaction

per se

(Latin) by, of, for, or in itself; intrinsically

etcetera

(Latin) and others; and so forth [edited for brevity]