A parent
Rigorous or stringent.
Rigorous or severe in approach or enforcement.
Rules, at times, can be very strict and harsh.
Another word for very strict or harsh is stern.
The word "draconian" is an adjective. It is commonly used to describe laws, rules, or actions that are harsh, severe, or oppressive.
Severe
Crossword puzzles may include a synonym of harsh, and it may be severe.
He was a very strict and harsh ruler
Because Joan was raised in a very strict household, she grew up to be very timid. Timid means shy.
It means that the boss was trying to soften the blow to you. To say you're fired is very harsh.
That is a very shrewd lady. Shrewd means filthy or harsh or mean or dirty. The young woman is very shrewd when shopping.