Part of Speech: Adjective

Definition: too long, slow, or dull: tiresome or monotonous

Source: Words at Dictionary

Found in “Success Story” by Mark Strand, Line 2

“Had I known at the outset the climb would be slow, difficult, at times even tedious, I would have chosen to walk the length of one of the local valleys, resigning myself to limited view, low thoughts and a life that inspired none of the loftier disenchantments.”

The word “Tedious” means too long, slow, or dull: tiresome or monotonous. The author is explain how slow and difficult his climb was compared to the local valley.