prehistoric /prē-hi-storˈik/ or prehistorical /prē-hi-storˈi-kəl/

1. Belonging or relating to a time before extant historical records
2. Antiquated, completely out of date (informal)
3. Primitive (informal)

• slyest
• slyish
• slyly
• slyness
• slynesses
• slype
• slypes
• slàinte
• s-m
• S & M
• SM
• Sm
• sma
• smack
• smackdown
• smacked
• smacker
• smackers
• smackhead
• smackheads
• smacking
• smackings
• smack one's lips
• smack on the wrist
• smacks