Degradation
来自Big Physics
mid 16th century: from Old French, or from ecclesiastical Latin degradatio(n- ), from the verb degradare (see degrade).
wiktionary
From French dégradation Morphologically degrade + -ation
etymonline
degradation (n.)
1530s, "a reduction in rank or dignity," from French dégradation (14c., Old French degradacion), noun of action from past-participle stem of degrader (see degrade). From 1752 as "state of being reduced from a higher to a lower grade or power;" by 1769 as "reduction of strength, value, magnitude, etc." Related: Degradational.
