The voiced consonant (th) minimally paired with the other consonants.

Find the minimally paired word that contrasts with the voiced tongue-tip between teeth, fricative consonant and practice pronouncing the difference between voiced tongue-tip between teeth fricative sound and the other consonants in each word pair. If you have the textbook <I>The Pronunciation of Standard American English</I> by James G. Luter, Ph.D., go to Chapter 6 and the audiotape lesson for the voiced /th/ sound and practice making the sound.