speak on

speak (up)on something

to talk about a particular topic. (Upon is formal and less commonly used than on.) This evening, I will speak upon the subject of Plato's thoughts on the universe. What will you speak on today?

Common Names:

Name	Pronounced	Usage
Dillon	DIL-ən	English
Azrael	-	Judeo-Christian Legend
Faiga	-	Yiddish
Darby	DAHR-bee	English
Ioudas	-	Biblical Greek
Nikolaas	-	Dutch