Where does “immunostimulative” come from?

immunostimulative (English) comes from English stimulative, from English -ive, from Middle English -yf, from Old French -if, from Latin -īvus, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Ancestry of “immunostimulative”, step by step

StepLanguageWordMeaning
1EnglishstimulativeHaving a stimulating effect; Something having a...
2English-iveAn adjective suffix signifying relating or...
3Middle English-yfA suffix designating adjectives, adverbs and...
4Old French-if-ive
5Latin-īvusAdjective suffix
6Proto-Indo-European-iHwós
7Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wósEvery word from Latin -īvusEvery word from English -ive