pro·pen·si·ty (pruh-pen-si-tee | prəpɛnsɪti)
a natural inclination or predisposition toward something, (obsolete) a predisposition or partiality toward something favourable
I have a propensity for using sexy words.
(see also: proclivity [link to follow])
Submitted by Elisa, via email.
January 13, 2012
mi·as·ma (my-az-muh, mee-az-muh | maɪæzmə, miæzmə)
1) noxious exhalations from putrescent organic matter; poisonous effluvia or germs polluting the atmosphere
2) a dangerous, foreboding, or deathlike influence or atmosphere
The miasma in the air was indicative of the approaching zombie hoard.