I have difficulty understanding the concept of adjectives of the various declensions. To my understanding, a noun must agree in number, gender, and case in Latin. The theory behind different nouns of different declensions is a relatively easy concept to grasp for me. The adjective, to my way of thinking, ought to be easier. You have noun “x? modified by adjective “y.?
e.g. “Porta magna?
“Magna” agrees in gender (f.), number (sg.) and declension (nom. Sg.).
Easy-peasy, lemon-squeezy.
What throws me off is when the case endings of the adjectives start to differ from the case endings on the nouns. What gives?
And then, the whole mess becomes even more complicated with different declensions of adjectives. Shouldn’t the endings be the same throughout all declensions? It’s bad enough Latin has five noun declensions, let alone a varied number of adjective declensions. Can anyone shed some light on this? I know the rules, but what I want to know is the reason why, and how. Thank you in advance.