窳
窳 – Yu3 – Useless
Useless thing of the day: A website for a business that has the hours of operation…. WRONG! It would be better not to post them at all if you aren’t feeling up to the task of keeping them up to date.
By the way, 窳 is apparently either an old or unusual word that means “Useless”. The more normal way to say it would be 沒用 – Mei2 Yong4 or 無用 – Wu2 Yong4, both of which mean “Without Use”. So I guess even 窳 is pretty 窳.