Open English Wordnet
Adjectives
(s)self-containedconstituting a complete and independent unit in and of itself“the university is like a self-contained city with shops and all amenities”
(s)collected, equanimous, poised, self-collected, self-contained, self-possessedin full control of your faculties“the witness remained collected throughout the cross-examination”, “perfectly poised and sure of himself”, “more self-contained and more dependable than many of the early frontiersmen”, “strong and self-possessed in the face of trouble”