Antonyms of adj unfrightened

1 sense of unfrightened

Sense 1
unfrightened -- (not affected by fright)

INDIRECT (VIA unafraid) -> afraid -- (filled with fear or apprehension; "afraid even to turn his head"; "suddenly looked afraid"; "afraid for his life"; "afraid of snakes"; "afraid to ask questions")

Similarity of adj unfrightened

1 sense of unfrightened

Sense 1
unfrightened -- (not affected by fright)
       => unafraid (predicate) (vs. afraid), fearless -- (oblivious of dangers or perils or calmly resolute in facing them)