The answer to 'toilet frozen' is that a frozen toilet is usually caused by extremely cold temperatures, often below freezing. Symptoms include the toilet bowl and pipes being frozen, preventing the toilet from flushing properly. The solution depends on the extent of the freezing.
For minor freezing, you may be able to thaw the toilet by pouring hot water around the base of the toilet or using a hair dryer to gently warm the area. However, if the pipes are severely frozen, it's best to call a professional plumber who can properly thaw the pipes and make any necessary repairs.