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
Ardashir	-	Persian
Porsche	[pɔtʃ]
Vitali	vee-TAH-lee (Russian)	Russian, Ukrainian
Maarja	MAH:RR-yah	Estonian
Honora	-	Irish, English
Kyrsten	-	English (Rare)