(Latin: through, across, over; beyond, by means of)

perfunctory (adjective), more perfunctory, most perfunctory
1. Descriptive of something that is done as a matter of duty or custom and lacking interest, care, or enthusiasm; indifferent or apathetic: During his lectures, as far as his students are concerned, the professor reveals himself to be merely a perfunctory instructor.
2. A reference to an activity which is hastily or superficially and mechanically accomplished: When music or dramas are performed merely as routine duties, then they might result in perfunctory renditions.
3. Etymology: from Latin perfunctorius, "done in a careless or superficial manner" from the Latin perfungi, "to accomplish" or "to get through with."
A performance taking place without enthusiasm.
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A reference to being done with little interest.
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perfusion (s) (noun), perfusions (pl)
1. The passage ("pouring") of fluid through the lymphatic system or blood vessels to an organ or a tissue.
2. Supplying of an organ or tissue with nutrients and oxygen by injecting blood or a suitable fluid into an artery.
3. A chemotherapy technique that may be used when melanoma occurs on an arm or leg.

The flow of blood to and from the limb is stopped for a while with a tourniquet, and anticancer drugs are put directly into the blood of the limb.

This allows the patient to receive a high dose of drugs in the area where the melanoma occurred.

perfusionist (s) (noun), perfusionists (pl)
An individual who assists the physician in all aspects of managing the equipment and techniques used during extra-corporeal circulation.

A perfusionist may also be involved in inducing prescribed hypothermia.

perjure (verb), perjures; perjured; perjuring
1. To knowingly tell an untruth in a legal court and render oneself guilty of not telling the truth: "Although the police officer swore that he had not been involved in bribery, the marked bills were evidence that he had perjured himself."
2. To make (oneself) guilty of deliberately testifying falsely under oath.
perjurer (s) (noun), perjurers (pl)
1. Someone who deliberately gives false testimony in a court of law.
2. A person who intentionally lies while under an oath administered by a notary public, court clerk, or other official, and thus commits the crime of perjury.

A perjurer may commit perjury in oral testimony or by signing, or acknowledging, a written legal document; such as, an affidavit, declaration under penalty of perjury, deed, license application, or tax return, while knowing that the document contains false information.

perjury (s) (noun), perjuries (pl)
1. A criminal offense of making false statements under oath.
2. The telling of a lie after having taken an oath to tell the truth, usually in a court of law.
3. Etymology: from 1387, "act of swearing to a statement known to be false", via Anglo-French parjurie (1292) and Old French parjurie, both from Latin perjurium, "false oath", from perjurare, "to swear falsely"; from per-, "away, entirely" + jurare, "to swear". The verb perjure is attested from 1453 (implied in perjured).
The willful telling of a falsehood in a legal trial.
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permeability (s) (noun), permeabilities (pl)
The characteristic of something that can be penetrated by a liquid: The gravel walkway up to the home of Mr. and Mrs. Black had much more permeability than the neighbours walkway which was made of stone.
permeable (adjective), more permeable, most permeable
Inclined to be penetrable: Jane uses a permeable coffee filter in her coffee machine to let the boiling water flow through the coffee grains to make a wonderful coffee in the morning.
1. To enter something and to spread or to flow throughout it, so that every part or aspect of it is affected.
2. For a chemical to pass through or to cause to pass through by osmosis or diffusion.
3. To pass through the smallest openings in a porous substance or membrane, or to make something such as a liquid pass through the substance or membrane.

When gas, liquid, or an odor permeates something, it spreads into and through every part of it.

If an attitude or feeling permeates someone, its influence can be clearly felt or seen.