Vietnamese củi

← Khmer អុស (cognate)

← Proto-Mon-Khmer *( )ʔus (inherited)

← Proto-Mon-Khmer *( )ʔuus (mention)

← Proto-Mon-Khmer *( )ʔuəs (mention)

← Proto-Vietic *guːs (inherited)

← Proto-Vietic *kuːs (mention)

← Muong cúi (cognate)

← Pacoh uih (cognate)

→ Khmer អុស (cognate)

→ Vietnamese bổ củi (compound)

→ Vietnamese than củi (compound)