ma–du, ma–da˜am, n. 1. Circle, orbit. 2. Coil, as of a snake or
     rope. 3. Mystic circular diagram. 4. Halo, as round sun or
     moon. 5. Array of an army in a circular form. 6. A gesture
     with one hand in which the tips of the middle finger and the
     thumb are joined and the other fingers are bent. 7. Disc, as
     of sun or moon. 8. District, province. A period of 40 days.

ma-dali, v.i. 1. To form into circles or coils, as a snake. 2. To
     bend the legs in a bow-like form. 3. To compose a poem so
     that the last letter, syllable or foot of its last line or stanza
     is the same as the first letter, syllable or foot of its first
     line or stanza.

v.t. To surround.

ma–dalam-ma–dilam, n. 1. Circle, orbit. 2. Disc, as of sun or moon.
     3. Coursing in a circle: 4. Horse, as running in a circle. 5. Sun.
     6. Moon. 7. The earth. 8. Atmosphere, Heavens. 9. Mirror. Cf.
     Pƒ–dil. 10. District, province.

Val

     As the Tamil consonant ‘v’ doesn’t combine with the vowel
‘u’ as an initial letter, there is no secondary root formed with ‘v’
base, but only a tertiary one, viz., val, which is an alteration of
pul or mul.

     val - vallam, n. Round ola basket.
     valli, n: Creeper, lit. that which is curved or flexible.
     vala, v.i. 1. To bend. 2. To encircle, surround.
     valai, n. Net, trammel, lit. ‘that which surrounds’.
     vali, v.i. & t. 1. To bend, curve. 2. To pull with a jerk.
     vil, n. Bow.
     vilƒ, n. Rib.
     va˜˜am, n. 1. A round dish or bowl.
              2. Hour-glass.
              3. A measure of grain.