Idhlaq conveys ease or fluency of articulation, particularly with the tongue tip and the lips. It does not mean careless speed or swallowing consonants.
Its six letters are collected in فِرَّ مِنْ لُبٍّ: ف، ر، م، ن، ل، ب. Some are articulated in the front region of the tongue, and others at the lips.
Examples: ف، ب, and م involve the lips, whereas ر، ن, and ل use front-tongue positions. Their relative ease of articulation is a classification of sound production, not permission to rush through them without clarity.