Questions & Answers about La okcidenta ĉambro estas granda.
Because -a is the normal adjective ending in Esperanto.
So:
- okcidento = west (a noun)
- okcidenta = western (an adjective)
In this sentence, okcidenta describes ĉambro, so it has to be an adjective.
Because they are both adjectives:
- okcidenta describes which room
- granda describes what the room is like
In Esperanto, adjectives take -a and agree with the noun in number and case.
Here, ĉambro is singular and not accusative, so both adjectives stay in the basic form:
- okcidenta ĉambro
- estas granda
If the noun were plural, you would get:
- La okcidentaj ĉambroj estas grandaj.