- practice (v.)
- 1392, "to do, act, or perform habitually," from O.Fr. practiser "to practice," from M.L. practicare "to do, perform, practice," from L.L. practicus "practical," from Gk. praktikos "practical." The noun is from 1421, originally as practise, from O.Fr. pratiser, from M.L. practicare. Also as practik, which survived in parallel into 19c. Practiced "expert" is from 1568; practicing (adj.) is recorded from 1625 in ref. to professions, from 1906 in ref. to religions.