You searched for: “conditio sine qua non
conditio sine qua non (Latin phrase)
Translation: "Indispensable condition."

When an agreement stands or falls on the inclusion of a particular condition, that condition may be called a conditio sine qua non, literally "a condition without which not".

This entry is located in the following unit: Latin Proverbs, Mottoes, Phrases, and Words: Group C (page 4)