encounter

Entry Definition
s/he meets it unexpectedly, comes upon it it by chance
s/he meets h/ unexpectedly, "bumps into" h/
s/he meets h/ by chance while walking
s/he encounters it by chance while walking
s/he gets angry at it when s/he encounters it (e.g., slow car ahead on highway), gets angry as result of encountering it
s/he gets angry at h/ when s/he encounters h/, gets angry as result of encountering h/
s/he encounters it suddenly or without warning, happens on it by surprise
s/he encounters h/ suddenly or without warning, surprises h/, ambushes h/