/
ɪkˈstɛnjʊeɪt, 
ɛk-/
v.
 
[
usu. as adj. extenuating]
 lessen the seriousness of (guilt or an offence) by reference to a mitigating factor.
Derivative
- extenuation n.
  - extenuatory
  
/-jʊət(ə)ri/
 adj. 
Etymology
ME (in the sense ‘make thin’): from L. extenuat-, extenuare ‘make thin’, based on tenuis ‘thin’.