fortnight

• fortnite

From Middle English fourtenight, fourten night, from Old English fēowertȳne niht (“fourteen nights”), equivalent to fourteen +‎ night. Compare sennight.

• (Received Pronunciation) IPA^(key): /ˈfɔːt.naɪt/
• (General American) IPA^(key): /ˈfɔɹt.naɪt/
• (NYC) IPA^(key): [ˈfɔəʔ.nɐjʔ]

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fortnight (plural fortnights)

1. (chiefly Britain, Ireland, Australia, New Zealand) A period of 2 weeks.

fortnight (not comparable)

1. (Should we delete⁽⁺⁾ this sense?) After a fortnight has passed.

   1852 Charles Dickens, Bleak House: We will proceed with the hearing on Wednesday fortnight.

• fortnightly
• microfortnight
• halfmonth

• sennight

• “fortnight” in Merriam–Webster Online Dictionary.