Webster’s Revised Unabridged Dictionary · 1913
Labefaction
Lab′e·fac′tion (·ē·făk′shŭn), n. [See Labefy.] The act of labefying or making weak; the state of being weakened; decay; ruin.
There is in it such a labefaction of all principles as may be injurious to morality. Johnson.