Where does “antiannexation” come from?

antiannexation (English) comes from English annexation, from Latin annexatio, from Latin adnecto, from Latin ad-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

antiannexation (English): Opposing annexation

Definitions

Opposing annexation

Ancestry of “antiannexation”, step by step

antiannexation traces back through two separate lines of ancestry.

via English annexation

Step	Language	Word	Meaning
1	English	annexation	Addition or incorporation of something, or...
2	Latin	annexatio	action of annexing
3	Latin	adnecto	I bind or tie to, connect, annex
4	Latin	ad-	to; usually prefixed to verbs, in which cases it...
5	Latin	īn-	un-, non-, not
6	Latin	în	in, at, on, upon, from (space)
7	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
8	Proto-Italic	en	in
9	Proto-Indo-European	h₁én	in

via English anti

Step	Language	Word	Meaning
1	English	anti	Opposed to something; That has a torsion angle...
2	English	anti-	Against, hostile to; Contrasting with the norm;...
3	Ancient Greek	ἀντι-	anti-, against; like, reminiscent of
4	Ancient Greek	ᾰ̓ντῐ́	opposite

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Latin ad- →