Scornfully is an adverb.
The part of speech for this particular word is a noun.
the part of speech sashay is a averb
Prefixes do not have their own part of speech.
the part of speech for hand is a noun or verb
Scornfully is an adverb.
crest
The top part of a wave is the crest; the bottom is the trough.
Wavelength
The crest is the name of the top part of a transverse wave
They are both part of a wave. The crest is at the top, and the trough is at the bottom.
crest
A crest is the point on a wave with the greatest positive value or upward displacement in a cycle. A trough is the opposite of a crest.
The two main parts of a wave are the crest and the trough. The crest is the high part of the wave and the trough is the bottom.
The crest on a horse is the curved part of the top of the neck slightly back from poll and the bridlepath.
In the deepest part of the ocean temple
a crest