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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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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
Seldom does something that benefits so few impinge on the pleasure of so many.
And when they impinge upon other students experience, it's time for them to
  take it outside.
Of course, if the minimum were so low as to impinge on none of the wage
  bargains actually being struck, there would be no effect.
Land development practices not only increase the fire risk but also impinge on
  wildlife habitats.
Related Words
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