Learn Turkish: Çorba çok sıcak, onu tadamazsın. - The soup is very hot, you cannot taste it.

It comes from the verb tatmak (to taste). It breaks down as tad (root) + a (inability suffix) + maz (negative aorist suffix) + sın (you). Together, it means you cannot taste.

Why did the 't' in tatmak change to a 'd' in tadamazsın?

This is consonant mutation. While most single-syllable verbs keep their hard consonants in Turkish, tatmak is an exception. When a suffix starting with a vowel is attached, like the inability suffix -a, the hard t softens to a d. You might remember this same rule applying to gitmek (to go).

What is the exact difference between tatmazsın and tadamazsın?

tatmazsın is the regular negative aorist meaning you do not taste (as a general fact, habit, or choice). By adding the -a- between the root and the negative suffix, we get tadamazsın, which adds the concept of inability: you cannot taste.

Why is it onu instead of just o?