தத்துவம்

Etymology 1
From.

Noun

 * 1) truth, reality, substance
 * 2) essential nature of things, quality
 * 3) constitution
 * 1) constitution

Etymology 2
From.

Noun

 * 1) bodily vigor, strength
 * 2) sexual energy or potency
 * 3) power, authority
 * 1) power, authority
 * 1) power, authority