O, what truths profound and executable only in ages and orbs, are supposed in the announcement of every truth!
late 14c., "to carry into effect," from Old French executer (14c.), from Medieval Latin executare, from Latin execut-/exsecut-, past participle stem of exequi/exsequi "to follow out" (see execution). Meaning "to inflict capital punishment" is from late 15c. Related: Executed; executing.