The estimated time it takes for an individual to become very weak due to lack of nourishment.
In Early Germanic time, the Germans would sometimes wait an entire "wikon" (german for come around again) For the early Germans, that which came around was known as market day, in which they were able to buy food for nourishment. If you missed market day, or did not have enough money, you would have to wait till next "wikon" when market day came back around. Germans nicknamed this as "WIC", later translated to WEAK in English, as it was the feeling they felt in between Market Days. (WICEND) WEAK-END (weekends) were the days before the new market day would start.