交集

jiāojí
  1. (of diverse emotions) to occur simultaneously; to intermingle
  2. common ground; points of commonality; overlap; connection
  3. interaction; dealings
  4. (math.) (set theory) intersection

CEDICT

math

Entry Composition

1 交 jiāo
  1. to hand over; to deliver; to pay (money); to turn over
  2. to make friends
  3. (of lines) to intersect
  4. variant of 跤 jiāo
2 集 jí
  1. to gather
  2. to collect
  3. collected works
  4. classifier for sections of a TV series etc: episode