English fortnight

← Old English fēowertīene niht (inherited)

← English fourteen (compound)

← English night (compound)

← English sennight (mention)

← Middle English fourtenight (inherited)

← Middle English fourten night (mention)

→ English fortnightly (suffix)

→ English microfortnight (prefix)

→ English sevennight (mention)

→ Tok Pisin potnait (derived)