the.com/subject
The one being studied, ruled, or grammatically bossed around — depending on which room you're in.
means A topic of study or discussion, a person under a ruler's authority, or the doer of a verb in a sentence.
from From Latin subiectus, thrown under — sub (under) plus iacere (to throw), the same root that hurls things into projectile and eject.
Royal flavorSubjects obey kings; citizens elect them.
Grammar jobThe subject does the verb's heavy lifting.
Same rootShares iacere with reject and inject.