verb
bemoan
bih-MOHN/bɪˈməʊn/
To express sorrow or dissatisfaction about something.
The woman bemoans her shattered vase, holding its broken pieces.

Etymology
Moan had the broader sense of mourning or bewailing, rather than just making a sorrowful sound. Be- directs that lament toward something, yielding the sense of expressing sorrow or complaint about it.
In context
as traditionalists bemoan a lost past when everything seemed so much better.
More examples
- He bemoans his bad luck after missing the bus.
- Critics bemoaned the film's predictable ending.
- Instead of bemoaning the delay, we explored the station.
Forms
bemoan · bemoans · bemoaned · bemoaning