Middle English siker

← Old English sicor (inherited)

← Middle English sure (doublet)

← Proto-West Germanic *sikur (inherited)

← Latin sēcūrus (derived)

→ English sure (cognate)

→ English sicker (inherited)

→ English sicker (inherited)

→ English siccer (inherited)

→ English siccar (inherited)

→ Welsh sicr (borrowed)

→ Middle English sure (doublet)