happen (EN)
verb

verb “happen”

happen; he happens; past happened, part. happened; ger. happening
  1. to take place or occur
    A surprise party happened at my office for the boss's birthday.
  2. to occur by chance or without intention
    I happened to find a $20 bill on the sidewalk this morning.
  3. to come across something by chance
    While hiking, we happened upon an old, abandoned cabin in the woods.