Where does “-cillin” come from?

-cillin (English) comes from English penicillin, from Translingual Penicillium, from Latin pēnicillum, from Latin -illus, from Latin -lus, from Proto-Italic -elos, from Proto-Indo-European -e-lós, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “-cillin”, step by step

StepLanguageWordMeaning
1EnglishpenicillinAny of a group of narrow-spectrum antibiotics...
2TranslingualPenicilliumgenus
3LatinpēnicillumA painter's brush
4Latin-illusUsed to form adjectives from nouns
5Latin-lusAlternative form of -ulus; diminutive suffix
6Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
7Proto-Indo-European-e-lós
8Proto-Indo-European-lósForms agent nouns from verbal roots

Words derived from “-cillin

Every word from Proto-Indo-European -lós