preach
/priːtʃ/verb
no obj.
1- deliver a sermon or religious address to an assembled group of people, typically in church（尤指在教堂聚众）布道; 宣讲：
he preached to a large congregation
他在一场大型圣会上布道
with obj. our pastor will preach the sermon.我们的牧师将宣讲这条训诫。
1.1
- with obj. publicly proclaim or teach (a religious message or belief)公开宣讲（教义, 信仰）：
a Church that preaches the good news of Jesus.
宣讲基督福音的教会。
1.2
- with obj. earnestly advocate (a belief or course of action)竭力鼓吹, 宣传（信念, 行动）：
my parents have always preached toleration and moderation.
我父母一向极力推崇容忍和中庸的思想。
1.3
- give moral advice to someone in an annoying or pompously self-righteous way（喋喋不休或自以为是地）告诫; 说教：
viewers want to be entertained, not preached at.
观众想要的是娱乐, 而不是说教。
短语
preach to the converted
- advocate something to people who already share one's convictions about its merits or importance向皈依者布道（对已经有信念者做宣传）。
词源
Middle English: from Old French prechier, from Latin praedicare 'proclaim'， in ecclesiastical Latin 'preach'， from prae 'before'+dicare 'declare'.