"Figuring something out"
"Finding something out"
"Discovering something"
"Break that down for me"
"Empty nesters"
"Building a case"
"Play your part"
"Influenza"
"Lunatic"
"Hysterical"
"Barbaric"
"Romantic"
Words that literally refer to mythological characters of literature but metaphorically have a meaning relating to aspects of those characters:
"Venereal"
"Hermaphrodite"
"Aphrodisiac"
"Quixotic"
"Tantalizing"
"Chaos"
"Herculean task"
"Narcissist"
"Oedipus complex"
"Atlas"
"Cloth"
"Echo"
"Erotic"
"Fortune"
"Jovial"
"Martial"
"Mercurial"
"Panic"
"Mentor"
"Office siren"
"Titanic"
Explain to me how friends, or lack thereof, changes "human nature"?