Yes, Italian adjectives agree with the noun in gender and number. But orribile belongs to a group of adjectives that have:
So you get:
Notice that masculine singular and feminine singular are both orribile.
A simple English-friendly guide is:
KWEH-sto roo-MOH-re eh or-REE-bee-le
A few useful pronunciation notes:
So try to avoid reducing the vowels the way English often does.
Not exactly.
So Questo rumore è orribile sounds natural if you are complaining about an annoying sound.
If you said Questo suono è orribile, that could also work, but it sounds a bit more neutral or technical depending on context.
Yes, if the context is clear, but the meaning changes slightly.
Compare:
Questo points to a specific noise, often one happening right now or one close to the speaker’s attention.
Questo rumore è orribile is the most neutral and natural word order.
Italian can change word order for emphasis, for example:
But for a learner, the standard order is the best one to use: