[{"Bold_text": "verb (used without object)", "List Items": ["to make an impression; have an effect or impact (usually followed byonorupon):to impinge upon the imagination; social pressures that impinge upon one's daily life.", "to encroach; infringe (usually followed byonorupon):to impinge on another's rights.", "to strike; dash ; collide (usually followed byon, upon,oragainst):rays of light impinging on the eye."]}, {"Bold_text": "verb (used with object)", "List Items": ["Obsolete.to come into violent contact with."]}]