Bhairava originates from your phrase bhīru, which suggests "fearsome". Bhairava implies "terribly fearsome type". It's also called just one who destroys worry or a person who's outside of anxiety. One interpretation is he safeguards his devotees from dreadful enemies, greed, lust, and anger. भारतीय संस्कृति प्रारंभ से ही प्रतीकवादी रही https://www.youtube.com/@tantramantraaurvigyaan