H3824 לֵבָב (lay-bawb')

KJV renderings: [phrase] bethink themselves, breast, comfortably, courage, ((faint), (tender-) heart(-ed), midst, mind, [idiom] unawares, understanding.
Strong's definition: the heart (as the most interior organ);
Derivation: from H3823 (לָבַב); used also like H3820 (לֵב)

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