H3856 לָהַהּ (law-hah')

KJV renderings: faint, mad.
Strong's definition: to be rabid (figuratively, insane); also (from the exhaustion of frenzy) to languish
Derivation: a primitive root meaning properly, to burn, i.e. (by implication)

From James Strong's public-domain dictionaries (H), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.