Where does “fajrosoldato” come from?

fajrosoldato (Esperanto) comes from Esperanto soldato, from French soldat, from Middle French soldat, from Italian soldato, from Italian soldare, from Italian soldo, from Italian saldare, from Italian saldo — whole.

Ancestry of “fajrosoldato”, step by step

fajrosoldato traces back through two separate lines of ancestry.

via Esperanto soldato

StepLanguageWordMeaning
1Esperantosoldatosoldier
2Frenchsoldatsoldier
3Middle Frenchsoldatsoldier
4Italiansoldatosoldier
5Italiansoldareto pay a soldier or military member
6Italiansoldopenny, cent; money
7Italiansaldareto solder, weld; to join; to put together; to...
8Italiansaldofirm, steady; sound; settlement, payment
9Latinsolidussolid; A solidus: a Roman ~23-carat gold coin...
10Proto-Italicsoliðos
11Proto-Indo-Europeansolh₂-i-dʰ-o-sentire
12Proto-Indo-Europeansolh₂-whole

via Esperanto fajro

StepLanguageWordMeaning
1Esperantofajrofire
2EnglishfireA chemical reaction involving the bonding of...
3Middle EnglishfierAlternative form of figer
4Old Englishfȳrfire
5Old EnglishfeorAlternative form of feorr; far
6Proto-Germanicferraifar, distant
7Proto-Indo-Europeanper-nóy
8Proto-Indo-Europeanper-before, in front; first; to go through
9Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European solh₂-