to carry on intensive and thorough research for data, information, or the like; investigate

to enlarge in discourse or writing; be copious in description or discussion

a state of affairs that makes urgent demands

in existence; still existing; not destroyed or lost

causing laughter because of absurdity; provoking or deserving derision; ridiculous; laughable

a tendency to change one’s mind without apparent or adequate motive; whimsicality

a particular period of time marked by distinctive features, events, etc

liable or subject to change or alteration

the quality of being successful in producing an intended result; effectiveness