1. Free from stain or blemish
   - immaculate 
2. (of language) not having its purity or excellence debased
   "learn to speak pure English undefiled"
   - uncorrupted

See also: perfect, pure

• tetracaine
• tetrachlorethylene
• tetrachloride
• tetrachloroethylene
• tetrachloromethane
• tetrachord
• tetrachoric correlation
• tetrachoric correlation coefficient
• Tetraclinis
• Tetraclinis articulata
• tetracycline
• tetrad
• tetradecanoic acid
• tetraethyl lead
• tetrafluoroethylene
• tetragon
• tetragonal
• Tetragonia
• Tetragonia expansa
• Tetragonia tetragonioides
• Tetragoniaceae
• Tetragonurus
• tetragram
• Tetragrammaton
• tetrahalide