(v): pass over, across, or through
(v): cause friction
(v): be in direct physical contact with; make contact
(v): scrape or rub as if to relieve itching
(v): excite to an abnormal condition, or chafe or inflame
(n): an unforeseen obstacle
(n): something immaterial that stands in the way and must be circumvented or surmounted
(n): the act of rubbing or wiping
(n): the act of touching physically
