selfconfident

As an adjective brash is

impetuous or rash or brash can be (us|colloquial|dated) brittle, as wood or vegetables.

As a noun brash is

leaf litter of small leaves and little twigs as found under a hedge.

Selfconfident is likely misspelled.

Selfconfident has no English definition.

As an adjective vain

is overly proud of oneself, especially concerning appearance; having a high opinion of one's own accomplishments with slight reason.

Selfconfident is likely misspelled.

Selfconfident has no English definition.

As an adjective uncooperative

is not cooperative.

Selfconfident is likely misspelled.

Selfconfident has no English definition.

As an adjective initiate

is unpractised; untried; new.

As a noun initiate

is a new member of an organization.

As a verb initiate

is to begin; to start.