English dubious

← English doubt (mention)

← English two (cognate)

← Proto-Indo-European *gʰeh₁bʰ- (root)

← Latin dubius (borrowed)

← Latin duo (derived)

→ English dubiousness (suffix)

→ English dubiously (suffix)

→ English dubcon (mention)

→ English indubious (affix)

→ English jubous (mention)

→ Danish dubiøs (cognate)

→ French louche (link)