Enervative vs. Onerous

To weaken or destroy the strength or vitality of

Troublesome or oppressive; burdensome.

(Medicine) To remove a nerve or part of a nerve.

(Law) Entailing more liabilities than benefits or imposing significant obligations.

Deprived of strength; debilitated.

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

Causing enervation.

Burdensome; oppressive.

Having power, or a tendency, to enervate; weakening.

not easily borne; wearing;