What is a word which begins with an unvoiced stop, has a tense vowel, and contains a voiced fricative?

Great question, and one which has many answers, but let’s take “teething” as an example. It begins with a voiceless stop, the “t” that does not involve the vocal cords in its production. Next, we find the tense vowel, sometimes called a long vowel in English, pronounced at the front of the mouth. Finally, we see the voiced dental fricative in the “th” sound. This sound is made with the tongue held between the upper and lower teeth. Note that the “th” sound at the end of “tooth,” for example, is not the same—try pronouncing both of these and you will hear the difference and feel the ways in which you hold your mouth and teeth differently in relation to your tongue while saying the words.