ag-, agen-, act-, agi-, agit-

(Latin: to set in motion, to hurry, to shake; to drive; to do, to act; to lead, to conduct, to guide)

activity (s) (noun), activities (pl)
1. The state of progressing or achieving something.
2. Energetic movement; liveliness.
3. A specified pursuit in which a person partakes; such as, an educational process or procedure intended to stimulate learning through actual experience.
4. The ability to take part in a chemical reaction.
5. A physiological process; such as, a respiratory activity.
actograph (s) (noun), actographs (pl)
1. A device enabling the amount of movement of an animal placed inside it to be recorded.
2. A record of motor activity.
actor (s) (noun), actors (pl)
1. Originally, an agent or doer.
2. A person who acts and gets things done.
3. Theatrical performers: A cast or troupe of actors.
actress (s) (noun), actresses (pl)
1. A woman, or girl, who acts in plays, movies, or television.
2. A woman or girl who pretends to be someone else or to feel something so as to impress or to deceive someone or other people.
actual (adjective) (no comparatives)
1. Existing and not merely potential or possible.
2. Being, existing, or acting at the present moment; current.
3. Based on fact: "She presented an actual account of the accident just as it happened."
actually (adverb) (no comparisons)
1. Implying that one would expect the fact to be the opposite of that which is stated.
2. Used to express wonder, surprise, or incredulity: "I actually won first place in the contest!"
3. A term used for expressing an opinion, often a contradictory one, or to change the subject: "Actually, I would prefer not to discuss this subject now."
actualness (s) (noun) (no plural)
Quality of being real or factual.
actuate (verb), actuates; actuated; actuating
1. To drive, to spark, to move to an action: After a rousing speech, the students were actuated to march and to demonstrate feelings against the university's increases in tuition costs.
2. To incite, to touch off, to inspire, or to provide an incentive to do something: After a long walk in the park, Peggy felt actuated to finish her term paper.
3. Etymology: from Medieval Latin actuare, "to act"; from Latin actus, past participle of the verb agere, "to do, to perform".
To put into action or movement, to incite.
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To arouse and to cause motion.
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Actum est. (Latin statement)
Translation: "It is done."

"It is over or finished."


A term that refers to dramatic sequences.

actus curiae
Act of the court.

Used in law.

actus Dei
Act of God.

More literally, a “driving” or the “moving forward of God”. Used in legal terminology to refer to any phenomena; such as, hurricanes, tornadoes, earthquakes, falling trees, hail storms, etc.

The greatest of all perplexities in theology has been to reconcile the infinite goodness of God with his omnipotence. Nothing puts a greater strain upon the faith of the common man than the existence of utterly irrational suffering in the universe.
—Walter Lippmann
Actus non facit reum nisi mens est rea.
The act does not make a criminal unless the intention is criminal.

A legal maxim.

actus purus
Pure act.

Thomas Aquinas’ conception of God as pure act, without matter or form.

adrenoreactive (adjective), more adrenoreactive, most adrenoreactive
Referring to a reaction to catecholamines: An adrenoreactive response to the production of hormones by the adrenal glands in bodily processes might cause a negative effect on the heart rate, blood pressure, the way the body uses food, or some other vital function, possibly as a result of an ailment of the adrenal glands.