You can indeed break down the meaning of protagonist.
However you cannot do it in latin. You can do it in greek.
Protagonist has a greek etymology, not a latin one.
Both greek and latin have been dropped in western education. Greek was dropped earlier and greek roots are often mistakenly called ''latin''.
Protagonist derives from the Greek πρωταγωνιστής (protagonistes = protagonist)
from πρώτος (protos = first)
from αγωνιστής (agonistes = fighter)
from άγω (ago = I lead, I fetch, I lead away)
In Ancient Greek theatre the protagonist was the actor having the leading role. (second role = δευτεραγωνιστής (deuteragonist); third role = τριταγωνιστής (tritagonist)
to back down
Mary Alice is the protagonist in A Year Down Yonder.
Latin "deicere," from "de" + "jacere," meaning "thrown down." Today it's used only in adjective form, as in "The players were dejected after their loss."
Don't let the bastards get you down! (Pigeon Latin)
To break a number or an expression down into factors.
Seperate it into smaller pieces
The Latin name for gold is aurum which means "shining down."'Au' is the chemical symbol for gold, it comes from the Latin word "aurum" meaning "shining dawn".the origin of the symbol Au is the Latin word "aurum" meaning "gold"
Thrombolysis is the break down of a thrombus by pharmaceutical treatment.
what is the latin word for down?
Jack fell down the hill (most likely pushed down by Jill) and sustained a massive skull-fracture.
The Latin verb ruo can mean either "I destroy" or "I fall down" (Lewis & Short's Latin Dictionary says that the latter meaning rarely applies when the subject is a person).