moralize

mor|al|ize /m'ɒrəlaɪz, AM m'ɔːr-/ (moralizes moralizing moralized)
in BRIT, also use moralise
[VERB] V
If you say that someone is moralizing, you are critical of them for telling people what they think is right or wrong, especially when they have not been asked their opinion.
As a dramatist I hate to moralize...
= preach
moralizing [N-UNCOUNT]
We have tried to avoid any moralising.