Sentence:  It is typical for adolescents to respond to the <WSD>doldrums</WSD>, feeling dead or numb inside, by sleeping a lot, watching hours upon hours of television, holing up in their room for days on end. 
Meaning of the word marked with <WSD> tags:  "Usually preceded by" '''(the)''': a state of apathy or lack of interest; a situation where one feels boredom, ennui, or tedium; a state of listlessness or malaise.