揺曳 is read as ようえい (youei) and means flutter.
ようえい
youei
ゆらゆら
swaying
ゆるがす
to shake
ゆる
ゆらぐ
to waver
ゆるぐ
ゆりかご
cradle
ゆれる
ゆさぶり
shaking
ゆさぶる
to put off a batter (by varying one's type of pitch)
ゆり
vibration
ゆらす
to rock
ゆらぎ
tremor