What are the root words for the list below

Abnegation
Dissonant
Potentate
Insignia
Dissection
Nugatory
Potential
Assonance
Segmented
Consignment
Despotic
Desegregate

Root words for the list:

- Abnegation (root word: neg)
- Dissonant (root word: son)
- Potentate (root words: poten, tate)
- Insignia (root word: sign)
- Dissection (root word: sect)
- Nugatory (root word: nuga)
- Potential (root word: poten)
- Assonance (root word: son)
- Segmented (root word: seg)
- Consignment (root words: con, sign)
- Despotic (root word: des)
- Desegregate (root word: seg)