Like many terms used in the legal profession, stipulate has its roots in Latin. It derives from stipulatus, the past participle of stipulari, a verb meaning "to demand a guarantee (from a prospective debtor)." Stipulate has been a part of the English language since the 17th century. In Roman law, oral contracts were deemed valid only if they followed a proper question-and-answer format; stipulate was sometimes used specifically of this same process of contract making, though it also could be used more generally for any means of making a contract or agreement. The "to specify as a condition or requirement" meaning of stipulate also dates to the 17th century, and is the sense of the word most often encountered in current use.