self-sufficient

self-sufficient is an   Adverb

Definition:

[1] Sufficient for one`s self without external aid or coöperation. Neglect of friends can never be proved rational till we prove the person using it omnipotent and self-sufficient, and such as can never need any mortal assistance. South.

[2] Having an overweening confidence in one`s own abilities or worth; hence, haughty; overbearing. "A rash and self-sufficient manner." I. Watts.

Synonyms: