LATIN DICTIONARYLexicon Latīnum
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“practice” in Latin

The English word practice itself goes back to Latin prācticus, through prācticāre.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

practice
usus: exercitatio: usus et consuetude. To grow so expert by practice that, in eam se consuetudinem adducere, ut (Caes., B.G., 4, 1): in practice, inter agendum; in agendo: plur., practices, i. e., arts, artes; machinae; callida consilia, plur.
As opposed to theory, usus rerum: usus et tractatio rerum: prudentia (skill). To have learned more by practice than by theory, minus in studio, quam in rebus et usu versatum esse: one must join theory and practice together, discas oportet, et quod didicisti agendo confirmes: the practice of a physician, medicinae usus et tractatio; of a barrister, causarum actio: to have an extensive practice, a multis consuli (of a physician); multas causas actitare (of a lawyer): to leave off practice, curandi finem facere (of a physician); causas agere desinere (of a lawyer).

Quick answer

What is the Latin word for practice?
The usual Latin words for “practice” are ūtor, exercitātiō, prūdēns; also ars, māchina. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.