I.
noun
ADJECTIVE
▪ early
▪ true
PIONEER + NOUN
▪ spirit
PREPOSITION
▪ ~ in , ~ of
▪
the early ~s in plastic surgery
▪
one of the ~s of modern art
II.
verb
Pioneer is used with these nouns as the object: ↑ approach , ↑ development , ↑ method , ↑ technique , ↑ use