Learn Italian: Annulliamo la riunione a causa del danno. - We cancel the meeting because of the damage.

The compound preposition for "because of" is a causa di. In Italian, you almost always need the definite article before a specific noun like danno. When the preposition di meets the article il (the), they combine to form the articulated preposition del.

Could we use per colpa del danno instead of a causa del danno?

You could, but it changes the tone. A causa di is a neutral "because of" or "due to." Per colpa di literally means "through the fault of" and is used to assign blame. While damage can technically be "to blame," a causa del sounds much more professional and objective for a business context.

Is riunione a false friend? It looks exactly like "reunion".

Yes, it is! While it looks like "reunion," la riunione usually means a "meeting," such as a business or staff meeting. To talk about a family reunion or a gathering of old friends, you would typically use words like un ritrovo or una rimpatriata.

Could annulliamo also translate to "let's cancel"?

Absolutely. In Italian, the present tense noi (we) form is identical to the "let's" command form (the imperative). Without extra context, this sentence can mean either "We cancel the meeting" or "Let's cancel the meeting."