八竿子打不着
bā​gān​zi​dǎ​bù​zháo

completely unrelated

  1. 八 bā numeral
    eight
    eight; 8
  2. 竿子 gān​zi
    pole
    a bamboo pole; a long rod made of bamboo or other materials
  3. 打 dǎ verb
    to hit
    to strike; to knock; to beat; to break
  4. 不 bu particle
    [potential]
    Used between a verb and its result to show that the action cannot achieve that result; used as the negative form of the 得 de potential construction
  5. 着 著 zháo particle
    [result]
    Used after a verb to show that an action was successful or reached its goal; meaning "hitting the mark".