protolanguage /prōˈtō-lang-gwij/

A hypothetical language (eg Proto-Germanic, Proto-Indo-European) regarded as the ancestor of other recorded or existing languages, and reconstructed by comparing these

• fudges
• fudging
• fuds
• Fuehrer
• fuel
• fuel assemblies
• fuel assembly
• fuel cell
• fuel cells
• fuel-injected
• fuel injection
• fuelled
• fueller
• fuellers
• fuelling
• fuelling machine
• fuel oil
• fuel oils
• fuel reprocessing
• fuel rod
• fuel rods
• fuels
• fuero
• fueros
• fuff