impinge

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im·pinge / imˈpinj/ • v. (-ping·ing) [intr.] have an effect or impact, esp. a negative one: Nora was determined that the tragedy would impinge as little as possible on Constance's life. ∎  advance over an area belonging to someone or something else; encroach: the site impinges on a greenbelt area. ∎  (impinge on/upon) Physics strike: the gases impinge on the surface of the liquid.DERIVATIVES: im·pinge·ment n.im·ping·er n.

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