attenuate
/əˈtenjueɪt; ə`tɛnjʊˌet/ v[Tn]
(fml 文)
1 make (sth/sb) thin or slender 使（某事物[某人]）变细或变瘦
attenuated limbs 枯瘦如柴的四肢.
2 (esp law 尤用於法律) reduce the force or value of (sth); weaken 减弱（某事物）的力量; 降低（某事物）的价值; 弱化
attenuating circumstances, ie facts that weaken the strength of an argument 情有可原的情形（可使辩论的强度减轻的事实）.