ظ، ذ، ث are articulated with the tip of the tongue near the edges of the upper front teeth. Accurate placement of the tongue tip is essential.
ظَلَمَ — emphatic ẓa.
ذَكَرَ — voiced dhal.
ثُمَّ — voiceless fricative tha.
They share a point but differ in their phonetic qualities. In particular, avoid turning ث into س, ذ into ز, or ظ into an ordinary z sound.
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Articulation of Letters — All Seventeen Makharij
ظ، ذ، ث are articulated with the tip of the tongue near the edges of the upper front teeth. Accurate placement of the tongue tip is essential.
ظَلَمَ — emphatic ẓa.
ذَكَرَ — voiced dhal.
ثُمَّ — voiceless fricative tha.
They share a point but differ in their phonetic qualities. In particular, avoid turning ث into س, ذ into ز, or ظ into an ordinary z sound.