Where does “dyftongizacja” come from?

dyftongizacja (Polish) comes from English diphthongization, from English diphthong, from French diphtongue, from Latin diphthongus, from Ancient Greek δῐ́φθογγος — with two sounds.

Ancestry of “dyftongizacja”, step by step

StepLanguageWordMeaning
1EnglishdiphthongizationAlternative spelling of diphthongisation
2EnglishdiphthongA complex vowel sound that begins with the sound...
3Frenchdiphtonguediphthong; digraph, trigraph; first-person...
4Latindiphthongusdiphthong
5Ancient Greekδῐ́φθογγοςwith two sounds
Every word from Ancient Greek δῐ́φθογγοςEvery word from Latin diphthongusEvery word from French diphtongue