What does "ephemeral" mean?
What does "mercurial" mean?
What does "serendipity" mean?
What does "quixotic" mean?
What does "bucolic" mean?
What does "sagacious" mean?
What does "lachrymose" mean?
What does "nonplussed" mean?
What does "defenestrate" mean?
What does "obfuscate" mean?