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Latin arbor
← Proto-Indo-European *h₃erdʰ- (root)
← Proto-Indo-European *h₃erdʰ- (derived)
← Old Latin arbōs (inherited)
← Proto-Italic *arðōs (inherited)
← Latin arduus (mention)

→ English arbor (mention)
→ English arbor (derived)
→ English arbour (derived)
→ English arbor vitae (mention)
→ English arboretum (mention)
→ English arboriform (mention)
→ English arboriculture (derived)
→ English arborvitae (affix)
→ English arborise (derived)
→ English arborator (mention)
→ English arbuscle (mention)
→ English arboreous (derived)
→ English arboricole (mention)
→ English arboricity (derived)
→ English arborary (mention)
→ English arborol (derived)
→ English Nullarbor (compound)
→ English arborolatry (derived)
→ Catalan noguera (mention)
→ Cimbrian albar (derived)
→ Dalmatian juarbol (inherited)
→ Middle English herber (cognate)
→ Middle English arbere (cognate)
→ Esperanto arbo (borrowed)
→ Esperanto arbusto (mention)
→ Spanish árbol (inherited)
→ Spanish arborizar (affix)
→ Spanish arbori- (derived)
→ French arbre (inherited)
→ French érable (mention)
→ French arbrisseau (mention)
→ French arboriser (affix)
→ Old French arbre (inherited)
→ Friulian arbul (inherited)
→ Galician nogueira (mention)
→ Galician árbore (inherited)
→ Hungarian árbóc (derived)
→ Ido arboro (borrowed)
→ Italian albero (inherited)
→ Italian arbore (learned borrowing)
→ Latin -or (mention)
→ Latin arboretum (suffix)
→ Latin arbustus (mention)
→ Latin arbustum (suffix)
→ Latin arduus (cognate)
→ Latin arboresco (affix)
→ Latin arboreus (mention)
→ Ligurian èrbo (inherited)
→ Ligurian arbanèlla (derived)
→ Macedonian јарбол (derived)
→ Neapolitan arvulo (inherited)
→ Norman âbre (inherited)
→ Old Spanish arbor (inherited)
→ Old Occitan arbre (inherited)
→ Portuguese árvore (inherited)
→ Portuguese arborizar (affix)
→ Romanian arbore (derived)
→ Romanian arbure (inherited)