onus

A difficult or disagreeable responsibility or necessity; a burden or obligation.

Responsibility for an error or fault; blame.

The burden of proof.

A burden: often used for onus probandi, ‘onus of proof.’

A burden; an obligation.

obligation to furnish evidence to prove a thing; the burden of proof.

A legal obligation.

Burden of proof, onus probandi

Stigma.

Blame.