Please, thank you, sorry — the words that keep you polite.

• مِنْ فَضْلِكَmin faḍlikaplease (said to a man)
• مِنْ فَضْلِكِmin faḍlikiplease (said to a woman)
• شُكْرًاshukranthank you
• شُكْرًا جَزِيلًاshukran jazīlanthank you very much
• عَفْوًاʿafwanyou're welcome; also: excuse me / pardon me
• آسِفʾāsifsorry (said by a man)
• آسِفَةʾāsifasorry (said by a woman)
• لَوْ سَمَحْتَlaw samaḥtaexcuse me / if you please (said to a man)
• لَوْ سَمَحْتِlaw samaḥtiexcuse me / if you please (said to a woman)
• نَعَمْnaʿamyes
• لَاlāno
• رُبَّمَاrubbamāmaybe / perhaps
• بِالطَّبْعِbi-ṭ-ṭabʿof course / naturally
• تَفَضَّلْtafaḍḍalhere you are / please go ahead (said to a man)
• تَفَضَّلِيtafaḍḍalīhere you are / please go ahead (said to a woman)
• مَعْذِرَةًmaʿdhiratanapologies / excuse me
• لَا شُكْرَ عَلَى وَاجِبٍlā shukra ʿalā wājibyou're welcome (lit. no thanks for a duty)
• أَهْلًا وَسَهْلًاʾahlan wa-sahlanwelcome (greeting a guest)
• بِكُلِّ سُرُورٍbi-kulli surūrwith pleasure / gladly