The correct answer is "grammar"
Linguist is a person who studies languages, semantics is the science of word and sentence meaning, and arbitrary means that something is subjected to individual will or judgement.
Roman roads is an adjective phrase. Roman is an adjective that expresses nationality and modifies roads
Military success is an adjective phrase. Military is modifying success.
He blames the gods (Zeus) for him fall asleep
if this helped please mark brainliest :)