Sentence:  We suffer from <WSD>summit fever</WSD>. We push just a little harder, hoping we can rest when we get to the top. When we postpone an oasis until our to-do list is finished or until we've answered all of the 193 emails in our in-box, then we have <WSD>summit fever</WSD>. 
Meaning of the word marked with <WSD> tags:  The obsessive need to complete a task.