http://www.thefreedictionary.com/Labefaction

Lab`e`fac´tion
n. 1. 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.

labefaction, labefactation
the process of coming apart, especially falling into ruin or decay.

http://www.thefreedictionary.com/labial

la·bi·al (lb-l)
adj.
1. Of or relating to the lips or labia.
2. Linguistics Articulated mainly by closing or partly closing the lips, as the sounds (b), (m), or (w).
n.
1. Linguistics A labial consonant.
2. Music See flue1.

labial [lay-bee-al]
Adjective
1. of or near the lips
2. Phonetics relating to a speech sound made using the lips
Noun
Phonetics a speech sound such as English p or m, that involves the lips [Latin labium lip]

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