a. 巨浪似的, 汹涌的

[ adj ]
characterized by great swelling waves or surges
<adj.all>
billowy storm cloudsthe restless billowing sea
surging waves

Billowy \Bil"low*y\, a.
Of or pertaining to billows; swelling or swollen into large
waves; full of billows or surges; resembling billows.

And whitening down the many-tinctured stream,
Descends the billowy foam. --Thomson.