What does impinging mean?
“Impinging” is the present participle of “impinge,” a formal word meaning to affect, encroach upon, or intrude into something. It is often used in discussions of law, politics, science, and the environment: a policy may impinge on personal rights, a development may impinge on protected land, or light may impinge upon a surface. The word’s basic idea is that one thing comes into contact with or exerts pressure upon another. Its physical sense, in which rays, particles, or objects strike a surface, is especially common in scientific and technical writing. Overall, “impinging” conveys a more formal and consequential interaction than simply “touching,” because it often suggests interference, encroachment, or the transfer of physical force.
To affect, encroach upon, or intrude into something, especially rights, territory, or a field of activity; also, to strike or come into contact with a surface.
"The policy could impinge upon the freedom of movement guaranteed by the treaty."
The word is formal. Its figurative and physical senses are both established, with the context determining which is intended.
Describing something that is affecting, encroaching upon, or making contact with another thing.
"The impinging rays were focused onto a small, polished surface."
This is a participial use and is especially common in technical writing involving light, particles, waves, or forces.
From the Latin for “to strike against,” “impinging” captures everything that bears down on a surface, a boundary, or someone’s rights.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does impinging come from?
The word comes from Latin impingere, “to strike against,” formed from the prefix in- and pīngere, “to strike or drive.” English borrowed the verb in the 17th century, initially in the sense of striking or colliding with something. Its later figurative sense, meaning to affect or encroach upon rights or interests, developed from the physical idea of making contact. Related English words include impact and impaction; pungent is also connected through the same ancient root for striking or piercing.
Related word forms
How impinging is actually used
In legal, political, and academic contexts, it usually means to affect or encroach upon something. In physics and engineering, it usually means to strike a surface or boundary. The word is formal and often carries a sense of pressure or intrusion.
Easily confused with impinging
“Impinging” is the present participle of “impinge,” while “impinge” is the infinitive form used to name the action.
“Impinging” describes an act of striking or affecting something, whereas “impingement” is a noun naming that act or contact.