onerous

Troublesome or oppressive; burdensome. synonym: burdensome.

Entailing more liabilities than benefits or imposing significant obligations.

Burdensome; oppressive.

In Scots law, imposing a burden in return for an advantage; being for a consideration: as, an onerous contract: opposed to gratuitous.

Synonyms 1. Heavy, weighty, toilsome.

Burdensome; oppressive.

a good and legal consideration; — opposed to gratuitous.

imposing or constituting a physical, mental, or figurative load which can be borne only with effort.

not easily borne; wearing