Strong's #1669: da'ab (pronounced daw-ab')

a primitive root; to pine:--mourn, sorrow(-ful).

Brown-Driver-Briggs Hebrew Lexicon:

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dâ'ab

1) (Qal) to become faint, languish

Part of Speech: verb

Relation: a primitive root

Usage:

This word is used 3 times:

 

Psalms 88:9: "Mine eye mourneth by reason of affliction: LORD, I have called daily"
Jeremiah 31:12: "as a watered garden; and they shall not sorrow any more"
Jeremiah 31:25: "soul, and I have replenished every sorrowful soul."