On spectrograms, this is the highest-frequency English phoneme with a noisy “TV static” (15[1])appearance. The sonority sequencing principle is most often violated by clusters that begin with this phoneme. In Maori borrowings, this is the frontmost phoneme that becomes /h/, which also occurs in Spanish syllable-final debuccalization. (15[1])A prothetic vowel is added to word-initial clusters starting with this phoneme in Hindi, Persian, and (*) Western Romance languages. Most Latin American Spanish dialects, but not Peninsular ones, no longer distinguish the dental /θ/ (“theta”) from this consonant. In English, this is the only phoneme that can occur before a nasal in an onset or begin a three-consonant onset. The most common fricative across languages is this voiceless sibilant. For 10 points, name this consonant that is also the most common pronunciation of the usual English plural suffix. ■END■