Where does “twiniling” come from?

twiniling (Old High German) comes from Proto-Germanic twinilingaz, from Proto-Germanic -ilingaz, from Proto-Germanic -ilaz, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “twiniling”, step by step

StepLanguageWordMeaning
1Proto-Germanictwinilingaz
2Proto-Germanic-ilingazForms noun-derivatives with sense of 'belonging...
3Proto-Germanic-ilazagent suffix; diminutive suffix
4Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lósEvery word from Proto-Germanic -ilazEvery word from Proto-Germanic -ilingaz