sennight
noun
sen·night ˈse-ˌnīt 
variants or less commonly se'nnight
archaic
: the space of seven nights and days : week
Word History
Etymology
Middle English, from Old English seofon nihta seven nights
First Known Use
15th century, in the meaning defined above
- Semitist
- semitists
- semitize
- semitized
- semitizes
- semitizing
- Semito-
- semitonal
- semitonally
- semitone
- semitones
- semitonic
- semitonically
- semitrailer
- semitrailers
- semitrailing
- semitrances
- semitranslucent
- semitransparencies
- semitransparency
- semitransparencyes
- semitransparencys
- semitransparent
- semitropic
- semitropical