FEARLESS
fearless, unafraid(p)
(adjective) oblivious of dangers or perils or calmly resolute in facing them
audacious, brave, dauntless, fearless, hardy, intrepid, unfearing
(adjective) invulnerable to fear or intimidation; “audacious explorers”; “fearless reporters and photographers”; “intrepid pioneers”
Source: WordNet® 3.1
Etymology
Adjective
fearless (comparative more fearless, superlative most fearless)
Without fear.
Synonyms
• frightless
Source: Wiktionary
Fear"less, a.
Definition: Free from fear.
Syn.
– Bold; courageous; interpid; valor -- Fear"less*ly, adv.
– Fera"less*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition