T-epenthesis

T epenthesis is the insertion of [t] between a homorganic nasal [n] and a voiceless fricative [s] in words like since [sɪnts] and once [wʌnts]. This process may be regarded as part of a wider phonetic process of oral stop epenthesis (also known as “intrusive stop formation” (Mora 2006), by which an oral stop can be inserted between a preceding homorganic sonorant (usually a nasal or a lateral approximant) and a following voiceless fricative which agrees in voicing with the stop (Mora 2002: 22).