initial th (voiced)

 Read left to right and go down the list:

middle th (voiced)

final th (voiced)

final th (voiced) +

word endings

*teethe is a verb. It's that which a baby does with his mouth when new teeth come through the gums. We say, The baby is teething.

Note: The voiced "th" sound comes from the mouth and the vocal chords. Contrast this with the unvoiced "th" sound which comes only from the mouth.