Where does “cross-fertilisation” come from?

cross-fertilisation (English) comes from English fertilisation, from English fertilise, from English -ise, from Middle English -ise, from Old French -ise, from Latin -itia, from Latin -ia, from Latin -ius — Creates adjectives from noun or verb stems.

Ancestry of “cross-fertilisation”, step by step

StepLanguageWordMeaning
1Englishfertilisationalternative spelling of fertilization
2EnglishfertiliseNon-Oxford British English standard spelling of...
3English-iseAlternative form of -ize; Suffix used in...
4Middle English-iseAlternative form of -yssh
5Old French-iseused to form feminine nouns, often denoting a...
6Latin-itia-ness, -ity
7Latin-iaUsed to form a feminine abstract noun, usually...
8Latin-iusforming adjectives from nouns; nominative neuter...
9Proto-Italic-jōsForms comparative adjectives
10Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius
cross-fertilisation — Etymology, Origin & Word History | Etymology Explorer