名詞 lullaby:

1. a quiet song intended to lull a child to sleep
   同義詞：cradlesong, berceuse
2. a quiet song that lulls a child to sleep
   同義詞：cradlesong

1. She was singing a lullaby to her child.
   她正在給孩子唱搖籃曲。
2. All mothers like to sing lullabies to their babies.
   所有的母親都喜歡給她們的孩子唱搖籃曲。

lull.a.by

n.（名詞）
【復(fù)數(shù)】 lull.a.bies 【音樂】
A soothing song with which to lull a child to sleep.
搖籃曲：將小孩帶入睡眠的安慰性歌曲
v.tr.（及物動(dòng)詞）
lull.a.bied,lull.a.bying,lull.a.bies
To quiet with or as if with a lullaby.
使安靜：用…使安靜，或類似在催眠曲中安靜下來

來源：
Obsolete lulla [word used in lullabies] from Middle English lullai from lullen [to lull] * see lull
廢語 lulla [催眠曲中的詞] 源自 中古英語 lullai 源自 lullen [使入睡，安撫] *參見 lull
by, bye as in good-bye
by, bye 如在 good-bye