Use 'unlovely' to describe places or things that create a negative visual impression. The building's unlovely exterior discouraged visitors.
Pro Tip 2/3
Metaphoric Use
'Unlovely' can be used metaphorically to describe abstract concepts negatively. The unlovely truth of the situation was hard to accept.
Pro Tip 3/3
Opposite of Lovely
Remember, 'unlovely' is the opposite of 'lovely'; use it when the opposite sentiment is needed. The garden, once vibrant, was now unlovely with neglect.