6. encounter, know, endure, suffer. Experience, undergo refer to encountering situations, conditions, etc., in life, or to having certain sensations or feelings. Experience implies being affected by what one meets with: to experience a change of heart, bitter disappointment. Undergo usually refers to the bearing or enduring of something hard, difficult, disagreeable, or dangerous: to undergo severe hardships, an operation.
late 14c., from O.Fr. experience, from L. experientia "knowledge gained by repeated trials," from experientem (nom. experiens), prp. of experiri "to try, test," from ex- "out of" + peritus "experienced, tested." The v. (1530s) first meant "to test, try;" sense of "feel, undergo" first recorded 1580s. Related: Experienced; experiences; experiencing.