verb (used without object), impinged, impinging.
to make an impression; have an effect or impact (usually followed by on or upon ): to impinge upon the imagination; social pressures that impinge upon one's daily life.
to encroach; infringe (usually followed by on or upon ): to impinge on another's rights.
to strike; dash; collide (usually followed by on, upon, or against ): rays of light impinging on the eye.
verb (used with object), impinged, impinging.
Obsolete. to come into violent contact with.

1525–35; < Medieval Latin impingere to strike against, drive at, equivalent to Latin im- im-1 + -pingere, combining form of pangere to fasten, drive in, fix; see impact

impingent, adjective
impinger, noun
impingement, noun
unimpinging, adjective

infringe, impinge. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
impinge (ɪmˈpɪndʒ)
1.  (intr; usually foll by on or upon) to encroach or infringe; trespass: to impinge on someone's time
2.  (intr; usually foll by on, against, or upon) to collide (with); strike
[C16: from Latin impingere to drive at, dash against, from pangere to fasten, drive in]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1530s, from L. impingere "drive into, strike against," from in- "in" + pangere "to fix, fasten." Sense of "encroach, infringe" first recorded 1758.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
We can forget about ourselves for a moment and open ourselves up to the startling impingement of reality itself.
Furthermore, it has no concern of rocket plume impingement on the asteroid surface.
Management of the throwing shoulder: cuff, labrum and internal impingement.
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