When someone is "weary," he or she is tired. Some times, we are tired because we have worked very hard physically. This might tempt you to pick "sore" or "aching," but "weariness" is tiredness. Therefore, the best option is actually "fatigued," which means very tired.

When something is "tedious," it is very boring. Often, this is because it is a repetitive thing, like a task that we have to do over and over again. The main meaning, however, of "tedious" is dull or boring.

When someone is "weary," he or she is tired. Some times, we are tired because we have worked very hard physically. This might tempt you to pick "sore" or "aching," but "weariness" is tiredness. Therefore, the best option is actually "fatigued," which means very tired.