Pioneer
/pˌaɪəˈnɪr/
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Definition
(noun) One who goes before, as into the wilderness, preparing the way for others to follow.
Sentence Examples
Pioneer men and women had a hard life, and so did their children.
He is what we call a pioneer.
CEFR Practice Quiz
She was a true ____ in the field of genetic research, publishing groundbreaking work in the 1970s.