Where does “-tico” come from?

-tico (Spanish) comes from Latin -ticus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “-tico”, step by step

StepLanguageWordMeaning
1Latin-ticusenlarged form of -cus
2Latin-tusForms the past participle of verbs; Forms...
3Proto-Italic-tus—
4Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tus →Every word from Latin -tus →Every word from Latin -ticus →