Ido voluntar

← English voluntary (borrowed)

← Spanish voluntario (borrowed)

← French volontaire (borrowed)

← Proto-Indo-European *welh₁- (derived)

← Ido volar (mention)

← Ido volontario (mention)

← Italian voluntà (borrowed)

← Latin voluntās (derived)

← Latin velle (mention)

← Latin volō (mention)

→ Ido volar (mention)