Sentence:  Doing it half-drunk wasn't all that hard. Doing it <WSD>one-handed</WSD> was hard but not insurmountable. Doing it <WSD>one-handed</WSD> and half-drunk was...The damned screws didn't want to stay in the plastic, and the instructions for putting a V-8 engine together had to be easier than this! 
Meaning of the word marked with <WSD> tags:  Using only one hand.