Ajena (en. Alien)
/aˈxena/
Slang Meanings
To refer to something that is not well understood.
All of this seems very foreign to me, I can't follow the conversation.
Todo esto me parece muy ajena, no logro seguir la conversación.
To use the word to describe a state of discomfort.
I was at a party that I wasn't part of and didn't know who to talk to.
Estuve en una fiesta ajena y no sabía con quién hablar.