lullaby

名词 lullaby:

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

1. She was singing a lullaby to her child.
   她正在给孩子唱摇篮曲。
2. All mothers like to sing lullabies to their babies.
   所有的母亲都喜欢给她们的孩子唱摇篮曲。

lull.a.by

n.（名词）
【复数】 lull.a.bies 【音乐】
A soothing song with which to lull a child to sleep.
摇篮曲：将小孩带入睡眠的安慰性歌曲
v.tr.（及物动词）
lull.a.bied,lull.a.bying,lull.a.bies
To quiet with or as if with a lullaby.
使安静：用…使安静，或类似在催眠曲中安静下来

来源：
Obsolete lulla [word used in lullabies] from Middle English lullai from lullen [to lull] * see lull
废语 lulla [催眠曲中的词] 源自 中古英语 lullai 源自 lullen [使入睡，安抚] *参见 lull
by, bye as in good-bye
by, bye 如在 good-bye