A more thorough explanation:

Definition: Invadiare (in-vay-dee-air-ee), vb.[Law Latin] Hist. To pledge or mortgage land.

Example: In medieval times, a lord might invadiare his land to a moneylender in order to secure a loan.

Explanation: Invadiare was a legal term used in medieval times to describe the act of pledging or mortgaging land. This was often done in order to secure a loan or other financial transaction. The example given illustrates how a lord might invadiare his land to a moneylender in order to obtain a loan. By doing so, the lord was essentially putting up his land as collateral for the loan, with the understanding that if he failed to repay the loan, the moneylender could take possession of the land.