subterfuge
🇺🇸
/ˈsʌbtərfjuːdʒ/
🇬🇧
/ˈsʌbtəfjuːdʒ/
a secret plan or action used to hide what you're really doing or to get something secretly
He used a bit of subterfuge to sneak out of the house without anyone noticing.
他用了一个小策略悄无声息地溜出了房子。