1. A situation, subject, or area that one has no previous experience with or knowledge about
After moving to a new country, she found herself on unfamiliar ground.
Após se mudar para um novo país, ela se viu em terreno desconhecido.
2. A place or location that one has never visited before
The explorers were treading on unfamiliar ground in the dense jungle.
Os exploradores estavam pisando em terreno desconhecido na selva densa.