What is the definition of Taukkunun?

"Taukkunun, my friend, is a Finnish word that roughly translates to 'the invisible thread connecting our souls' - or more precisely, the inexplicable connection that binds two people so tightly they're practically living in parallel universes. However, let's give it an unsettling twist: "After the twins' heartfelt reconciliation, their taukkunun grew so strong it felt like they were secretly plotting to sabotage each other's careers." Talk about a connection that could lead to a career war!