atavism /atˈə-vi-zm/

1. The reappearance of ancestral, but not parental, characteristics
2. Reversion to an ancestral, or to a primitive, type

atavistˈic adjective

atavistˈically adverb

• soap-works
• soapwort
• soapworts
• soapy
• soar
• soaraway
• soare
• soared
• soarer
• soarers
• soares
• soaring
• soaringly
• soarings
• soars
• so as
• so as to
• Soave
• Soaves
• Soay
• Soay sheep
• s.o.b.
• sob
• S.O.B.
• SOB