However, depending on the context, here are some appropriate phrases you can use:
Formal:
* أهلاً و سهلاً (Ahlan wa sahlan) - This is the most common and versatile phrase, meaning "Welcome."
* مرحباً (Marhabaan) - This phrase means "Hello" but can also be used as a greeting that implies "Welcome."
Informal:
* اهلين (Ahlan) - A shortened version of "أهلاً و سهلاً", more casual and friendly.
* حياكم الله (Hayaakum Allah) - Literally "May Allah grant you life," it conveys a warm welcome and hospitality.
* مُرْحَبًا بِكُم (Murhában bikum) - "Welcome" in a formal way, appropriate for a larger group of people.
Specific scenarios:
* أهلاً و سهلاً بكم في بيتنا (Ahlan wa sahlan bikum fi baytina) - "Welcome to our home."
* أهلاً و سهلاً بكم في بلدنا (Ahlan wa sahlan bikum fi baladna) - "Welcome to our country."
* أهلاً و سهلاً بكم في هذا الحدث (Ahlan wa sahlan bikum fi hadha al-hadith) - "Welcome to this event."
Remember, the best way to say "welcome" is to choose a phrase that feels natural and appropriate to the situation.