Bible Dictionary
STOCK
Stock may mean the stem or trunk of a tree, a family line, or an instrument of punishment. In some biblical passages it is associated with idolatrous wooden objects; elsewhere it denotes ancestry or confinement.
Biblical Usage
The Bible uses stock for tree stems, wooden objects possibly associated with idolatry, family descent, and instruments of punishment. It can therefore belong to natural, genealogical, religious, or judicial contexts.