ground·break·ing 
/ˈgraʊndˌbreɪkɪŋ/ adjective
/ˈgraʊndˌbreɪkɪŋ/ adjective [more groundbreaking; most groundbreaking] : introducing new ideas or methods
▪ She was honored for her groundbreaking work in nuclear physics. ▪ a groundbreaking new book
▪ She was honored for her groundbreaking work in nuclear physics. ▪ a groundbreaking new book
