An Etymological Dictionary of Astronomy and Astrophysics

1a) Something done or performed as a means of practice or training.

1b) A putting into action, use, operation, or effect. <BR>

2a) To put (faculties, rights, etc.) into action, practice, or use. <BR>

2b) To put through exercises, or forms of practice or exertion, designed to train,
develop, condition, or the like (Dictionary.com).

Etymology (EN): M.E., from M.Fr. exercice, from L. exercitium “training, exercise” (of soldiers, horsemen, etc.); from → ex- “off” + arcere “keep away, prevent, enclose.”

Etymology (PE): Âvaržeš, verbal noun from Âvaržidan, from prefix â- + varž, “work,” variant of varz, → practice, + infinitive suffix -idan.