Feel sad, repentant, or disappointed over (something that has happened or been done, esp. a loss or missed opportunity).
A feeling of sadness, repentance, or disappointment over something that has happened or been done.
verb. rue – deplore – repent – lament – mourn – be sorry
noun. repentance – remorse – sorrow – grief – contrition
This is what can happen when some people get greedy about the land they own. Lots of vacant buildings in a town which is fighting to thrive.