Compounds of 前人

• 前人
  (n) predecessor
  former people
• 前人未到
  (adj-na,n) untrodden (region, field of study, etc.)
  unprecedented (discovery, achievement, etc.)
• 前人未踏
  (adj-na,n) untrodden (region, field of study, etc.)
  unprecedented (discovery, achievement, etc.)
• 前人未発
  (n) unprecedented
  unheard-of
  never propounded (discovered, invented) by anyone before