動詞 preach:

1. deliver a sermon
   同義詞：prophesy
2. speak, plead, or argue in favour of
   同義詞：advocate

1. She preached economy as the best means of solving the crisis.
   她大力鼓吹節(jié)約是解決危機的關鍵。
2. He was always preaching the virtues of capitalism.
   他總是宣傳資本主義的長處。
3. Christ preached that we should love each other.
   基督在布道中說人們應該互敬互愛。
4. Those people go around preaching revolution.
   那些人到處宣揚革命。
5. The priest preached a sermon on the need of charity.
   牧師在布道會上宣講慈愛的必要。

preach

v.（動詞）
preached,preach.ing,preach.es
v.tr.（及物動詞）
To proclaim or put forth in a sermon:
布道：在講道時宣講或提出：
例句：
preached the gospel.
傳福音

To advocate, especially to urge acceptance of or compliance with:
宣揚：鼓吹，尤以促使（人們）接受或遵守：
例句：
preached tolerance and peaceful coexistence.
宣揚容忍及和平共處

To deliver (a sermon).
講（道）
v.intr.（不及物動詞）
To deliver a sermon.
講道
To give religious or moral instruction, especially in a tedious manner.
說教：給予宗教或道德訓誡，尤指以冗長乏味的方式

來源：
Middle English prechen
中古英語 prechen
from Old French preechier
源自 古法語 preechier
from Late Latin praedic3re
源自 后期拉丁語 praedic3re
from Latin [to proclaim]
源自 拉丁語 [宣告]
prae- [pre-]
prae- [前綴，表.在…之前.]
dic3re [to proclaim] * see deik-
dic3re [宣揚] *參見 deik-

【引伸】
preach.ingly
adv.（副詞）