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
Puteri	-	Malay
PÁL	PAHL	Hungarian
Irmentrud	EER-men-troot	German (Archaic)
OdhrÁN	O-rawn	Irish
Eaton	['i:tn]
Crispin	KRIS-pin	English (Rare)