The word golem is used in the Bible to refer to an embryonic or incomplete substance: Psalm 139:16 uses the word "gal'mi", meaning "my unshaped form" (in Hebrew, root words are defined by sequences of consonants, ie. glm). The Mishnah uses the term for an uncultivated person ("Ten characteristics are in a learned person, and ten in an uncultivated one", Pirkei Avoth 5:7). Similarly, Golems are used today primarily in metaphor either as brainless lunks or as entities serving man under controlled conditions but enemies in others. Similarly, it is a Yiddish slang insult for someone who is clumsy or slow.