Since the meanings of the words harsh and hard are similar but not the same, does "harsh on" make sense?
For example:
Calm down you shouldn't be too harsh on him.
Since the meanings of the words harsh and hard are similar but not the same, does "harsh on" make sense?
For example:
Calm down you shouldn't be too harsh on him.
“Harsh on” may be acceptable, but “harsh to” is far more common.
I don't think anyone would look at you wrong if you said it, but using harsh instead of hard is probably more of a malapropism in most cases. That being said, because English is so fluid, "harsh on" could easily become more normal if it's used more.