extenuate

To make (something) less dense, or thinner; also, to lower the viscosity of (something).

To make (someone or something) slender or thin; to emaciate, to waste.

To underestimate or understate the importance of (something); to underrate.

To diminish or seek to diminish the extent or severity of (a crime, guilt, a mistake, or something else negative) by making apologies or excuses; to palliate.

To beat or draw (a metal object, etc.) out so as to lessen the thickness.

To reduce the quality or quantity of (something); to lessen or weaken the force of (something).

To degrade (someone); to detract from (someone's qualities, reputation, etc.); to depreciate, to disparage.