frivolous |ˈfrivələs|
adjective
not having any serious purpose or value :rules to stop frivolous lawsuits.
• (of a person) carefree and not serious.
DERIVATIVES
frivolity |friˈvälətē| noun
frivolously adverb
frivolousness noun
ORIGIN late Middle English : from Latin frivolus ‘silly, trifling’ + -ous .

morbid
|ˈmôrbəd|
adjective
1 characterized by or appealing to an abnormal and unhealthy interest in disturbing and unpleasant subjects, esp. death and disease : he had long held a morbid fascination with the horrors of contemporary warfare.
2 Medicine of the nature of or indicative of disease : the treatment of morbid obesity.
DERIVATIVES
morbidity |môrˈbidətē| noun
morbidly adverb
morbidness noun
ORIGIN
mid 17th cent. (in the medical sense): from Latin morbidus, from morbus ‘disease.’
proclivity
|prōˈklivətē; prə-|
noun ( pl. -ties) a tendency to choose or do something regularly; an inclination or predisposition toward a particular thing : a proclivity for hard work.
ORIGIN
late 16th cent.: from Latin proclivitas, from proclivis ‘inclined,’ from pro- ‘forward, down’ + clivus ‘slope.’




