Tafsir (Arabic: تفسير‎, tafsīr, "interpretation") is the Arabic word for exegesis or commentary, usually of the Qur'an. It does not include esoteric or mystical interpretations, which are covered by the related word Ta'wīl. An author of tafsīr is a mufassir (Arabic: 'مُفسر‎, mufassir, plural: Arabic: مفسرون‎, mufassirūn).