mope
UK[məʊp]US[moʊp]
v
to be sad and to do nothing, especially because you are unhappy or disappointed
n
a person who mopes
Etymology
the verb 'mope' first appeared in english in the 16th century. its exact origin is obscure, but it is thought to be an expressive formation, perhaps imitating the sound or manner of someone sulking or moving listlessly. it may be connected to the middle low german 'mopen' meaning to sulk, or to the obsolete english word 'mop' which referred to a grimace. the core idea evolved from a state of stupefaction or dullness into the modern sense of being dispirited, apathetic, and idle due to unhappiness.
Analysis
the word is a simplex. its origin is uncertain, but it is likely imitative or expressive in nature, possibly related to scandinavian words for sulking or to the middle english 'mopen' meaning to be dazed or stupefied.
Examples
don't just mope around the house all day; go out and get some fresh air.
after losing the match, he spent the weekend moping in his room.
she's such a mope when her plans get cancelled.