H3939 לַעֲנָה (lah-an-aw')

KJV renderings: hemlock, wormwood.
Strong's definition: wormwood (regarded as poisonous, and therefore accursed)
Derivation: from an unused root supposed to mean to curse;

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