Having or showing no awe. Fearless, bold, courageous.

Void of dread or fear; having no fear; fearless; not apprehensive. Const. of.

Having no dread; unapprehensive (of). Obsolete.

Afraid of nothing, fearless; (in later use) resembling or likened to a dreadnought (sense A. 1b). Now rare.

Not mindful of the future; unapprehensive.

Not anticipative or fearful of danger, etc.

(un-, prefix1 affix 7b affix 4.)