Adjective
roundabout - Describing a way of doing something that is not straightforward, often involving detours, twists, or delays.
She gave a roundabout explanation when asked about her plans, avoiding a direct answer and making it difficult to understand her true intentions.
frazzled - To feel completely exhausted and worn out, and unable to think straight, after a great deal of mental or physical effort
After being up two nights in a row writing a 60 page history paper, and drinking 60 cups of coffee, Simon's mind felt frazzled.