willow

Boyd’s Bible Dictionary:

Before the captivity the willow was an emblem of joy

Concise Bible Dictionary:

Salix Babylonica
Salix Babylonica
Salix Babylonica

Strong’s Dictionary of Hebrew Words:

Transliteration:
`arab
Phonic:
aw-rawb’
Meaning:
from 6148; a willow (from the use of osiers as wattles)
KJV Usage:
willow