snap

"snap" は多くの意味や用法があるのでやっかいな単語です。THE ADVENTURES OF HUCKLEBERRY FINNにあった次の文の "snap" の用法も私は初めて見る例です。
Miss Charlotte she held her head up like a queen while Buck was telling his tale, and her nostrils spread and her eyes snapped.
辞書で意味を探します。
・Dictionary.com: to be radiant; sparkle; flash, as the eyes.
・American Heritage Dictionary: To flash or appear to flash light; sparkle: eyes that snapped with anger.
Wordnikの次の文例も参考になります。
His eyes snapped open to the clang of the service bell and did a bewildered zigzag to check his whereabouts. --Alfred Hitchcocks Mystery Magazine
明日から福岡に行きますので連休明けまで私のブログはお休みします。