Where does “un-Americanise” come from?

un-Americanise (English) comes from English Americanise, from English -ise, from Middle English -ise, from Old French -ise, from Latin -itia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

Ancestry of “un-Americanise”, step by step

StepLanguageWordMeaning
1EnglishAmericaniseBritain standard spelling of Americanize
2English-iseAlternative form of -ize; Suffix used in...
3Middle English-iseAlternative form of -yssh
4Old French-iseused to form feminine nouns, often denoting a...
5Latin-itia-ness, -ity
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius