Oppressive (adjective)

1. Causing a heavy and burdensome feeling.
2. Exerting power in a cruel and unjust way.
3. Being excessively harsh or strict.

Origin:

From latin oppressus (burdened, weighed down), from opprimere (to burden, to weigh down), from ob- (over) + premere (to press).

Examples:

1. The oppressive heat made it difficult to do anything outside.
2. The oppressive government imposed strict controls on the media and free speech.
3. The oppressive rules and regulations made it impossible to enjoy the workplace.
4. The oppressive system disadvantaged marginalized groups and perpetuated inequality.
5. The oppressive regime was finally overthrown after years of resistance and struggle.