to meet someone unexpectedly
jemanden unerwartet treffen (jemanden unerwartet treffen)
"I bumped into an old friend at the mall."
"Ich traf einen alten Freund im Einkaufszentrum." (Ich **traf** einen alten Freund im Einkaufszentrum.)
to end a relationship or stop communicating with someone
to make a formal request for something
to finish or complete a business transaction
to start a journey; to leave a place
to fail to achieve or find something
to stop doing something annoying or bad