per-

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

percutaneous ultrasonic lithotriptor
A device that uses ultrasound to break up kidney stones and gallstones.

The sound waves are applied to the outside of the body and penetrate to the calculi.

perdition
perdricide
The killing of partridges; partridge killing.
peregrinate (verb), peregrinates; peregrinated; peregrinating
1. To travel around in a location or from place to place; especially, by walking: Whenever Adam and his family went on trips, they peregrinated as much as possible in order to get a better view of where they were.
2. Etymology: from Latin peregrinus, "foreign"; from pereger, "traveling"; from per-, "through" + ager, "a field, land".
To go on journeys in different places.
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To travel on foot or to walk.
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perennial (adjective), more perennial, most perennial
1. Descriptive of something which lasts a very long time; enduring; recurring: Communication between the different offices in the building seems to be perennial, because the secretaries often convey information about their jobs to each other, and sometimes this causes problems!
2. Characteristic of a plant which lives for many years: Several kinds of herbs are perennial, in that they don’t have to be planted every year in order to exist.
3. Concerning a person who evidently is quite involved in a certain way of life or role: There are students who are perennial and go to their universities year after year and earn many qualifications!
4. Relating to a spring or waterway which flows continuously throughout the year: Tom's family relies on the perennial stream close to their cabin for their water supply.
Relating to something that takes place over and over again.
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A reference to something that can be expected very often.
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Pertaining to something that lasts for a long time or is often repeated.
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perennially
Pereunt et Imputantur.
The days pass and are reckoned to our account.

Motto on The Exeter Clock in Exeter, England.

perfect
perfection
perfectionist
perfectly
perfervid (adjective), more perfervid, most perfervid
1. Descriptive of someone or something that is very fervent; extremely ardent; impassioned: Adam's perfervid patriotism was considered by his friends to be outstanding.

Simon had the most perfervid devotion to being a computer expert.

2. Etymology: from Latin perfervidus, from per-, "utterly, throughly" + fervidus, "fiery, glowing hot".
Relating to being very zealous or eager.
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perfidious (adjective), more perfidious, most perfidious
Characterized by guilt or violating trust, loyalty, or allegiance; basely treacherous: A perfidious friend told a robber where precious coins were hidden in Isaac's house.
Disloyal and untrustworthy.
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Untrusted and not loyal.
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perfidiously (adverb), more perfidiously, most perfidiously
1. A reference to being treacherously deceitful.
3. Relating to or characterized by being a traitor or disloyal.
perfidy (s) (noun), perfidies (pl)
1. The deceitful violation of faith or a betrayal of the trust in someone; treachery: Karen's closest friend was committing perfidies against her by revealing her private feelings to other people in the school.
2. The profession of faith or friendship in order to deceive or to betray another person: Mike pretended to be Sharon's friend in order to perform a perfidy that could ruin her career as an executive officer in the company.
Disloyalty and a treachery.
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