This is the 3334th most frequent Japanese word.
提唱
"提唱" means "advocacy" or "proposing an idea or theory."
In this sentence, '提唱' (teishō) denotes proposing or advocating an idea or policy.
彼は新しい教育方針を提唱した。
He advocated for a new educational policy.
Here, '提唱' refers to the act of proposing or suggesting a theory.
その理論は彼が提唱したものだ。
That theory was proposed by him.
In this instance, '提唱' is used passively to describe a plan that was proposed and accepted.