retropharyngeal

Mid 19th century from retro- +‎ pharyngeal, after French rétro-pharyngien.

• (Received Pronunciation) IPA^(key): /ˌɹɛ.tɹəʊ.fəˈɹɪn.d͡ʒi.əl/, /ˌɹɛ.tɹəʊ.fa.ɹɪnˈd͡ʒiː.əl/, /ˌɹɛ.tɹəʊ.fa.ɹənˈd͡ʒiː.əl/
• (General American) IPA^(key): /ˌɹɛ.tɹoʊˌfæɹ.ənˈd͡ʒi.əl/, /ˌɹɛ.tɹoʊ.fəˈɹɪn.d͡ʒi.əl/, /ˌɹɛ.tɹoʊ.fəˈɹɪn.d͡ʒəl/
• Rhymes: -ɪndʒiəl, -ɪnʒiəl, -iːəl, -ɪndʒəl

retropharyngeal (not comparable)

1. (anatomy, relational) Located behind the pharynx.

• retropharyngeally

• retropharynx

• “retropharyngeal”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “retropharyngeal”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.