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Achilles’ heel
weak point
stentorian
very loud
mnemonic
assisting memory
fathom
understand, figure out, penetrate the meaning of
serendipity
ability to make lucky discoveries by chance or accident
desultory
random, unmethodical, aimless
pariah
social outcast
tawdry
showy and cheap
pecuniary
relating to money
impecunious
having little or no money; poor