unexplored; unsurveyed
Used for areas, fields, or topics that have not yet been investigated or surveyed. Often appears in academic, scientific, or geographical contexts.
That area remains unexplored.
More researchers are tackling unexplored fields.
Compound of 未 (mi, 'not yet') + 踏査 (tōsa, 'survey, exploration'). 踏査 itself is a Sino-Japanese word meaning 'to explore on foot'.