Words with Suffix “--ein” in English (US)

Phenolsulphonephthalein is an 8-syllable chemical compound noun: phe-nol-sul-pho-ne-phtha-le-in. It combines three morphemes (phenol + sulphone + phthalein) of Greek/Latin origin. Primary stress falls on the 7th syllable (-le-), with secondary stresses on syllables 1 and 3. The unusual /fθ/ cluster in 'phtha-' is a legal English onset. IPA: /ˌfiːnɒlˌsʌlfoʊnˈfθæliːɪn/.

Tetraiodophenolphthalein is a 10-syllable chemical compound noun (tet-ra-i-o-do-phe-nol-phthal-e-in) with Greek-derived morphemes: tetra- (four), iodo- (iodine), phenol (aromatic alcohol), and phthalein (indicator compound suffix). Primary stress falls on 'phthal' with secondary stresses on 'tet', 'i', 'do', and 'nol'. The word follows morpheme-boundary syllabification rules typical of scientific nomenclature, with the 'phth' cluster simplified to /θ/ in American English.

Compound chemical noun with 9 syllables; orthographic syllabification te-tra-i-o-do-phe-nol-phtha-lein; primary stress on phtha; IPA /ˌtɛtrəˌaɪoʊdoʊˌfiːnəlˈθeɪliːn/.

Thymolsulphonephthalein is a complex noun with seven syllables (thy-mol-sul-pho-neph-tha-lein). Primary stress falls on the first, fifth, and ninth syllables. Syllabification follows standard English rules of vowel-consonant division and consonant cluster retention, with consideration for digraphs. It's a chemical indicator with Greek and Latin roots.