WordNet: extenuation, mitigation, palliation

to act in such a way as to cause an offense to seem less serious

• hypernym decrease, diminution, reduction, step-down

extenuation

• (englanti) extenuate (derivationally related)
• (suomi) lieventäminen (synonyymi)

mitigation

• (englanti) mitigate (derivationally related)
• (suomi) lieventäminen (synonyymi)

palliation

• (englanti) palliate (derivationally related)
• (suomi) lieventäminen (synonyymi)