pioneers is a form of:

Pioneer



noun
1.
(បច្ចេកទេស) អ្នកត្រួសត្រាយ, ធ្វើជាអ្នកត្រាយផ្លូវ
ENGLISH MEANING
noun
1.
A soldier detailed or employed to form roads, dig trenches, and make bridges, as an army advances.
2.
One who goes before, as into the wilderness, preparing the way for others to follow; as, pioneers of civilization; pioneers of reform.
verb
1.
(TRANSITIVE, INTRANSITIVE) To go before, and prepare or open a way for; to act as pioneer.