English quid

← Old English cwidu (inherited)

← Old English cwudu (mention)

← English quid pro quo (mention)

← English quids in (link)

← English quede (mention)

← English cud (doublet)

← Middle English quide (inherited)

← Latin quid (borrowed)

← Latin quis (mention)

→ English quidlet (suffix)

→ Middle English code (link)