严谨: rigorous, strict, careful, cautious, compact, well-knit...
滋润: moist, humid, to moisten, to provide moisture, comfortably off...
丑陋: ugly...
证人: witness...
勺: spoon, ladle, centiliter (unit of volume)...
笨蛋: fool, idiot...
密: secret, confidential, close, thick, dense...
特大: exceptionally big...
黑: black, dark, sinister, secret, shady, illegal, to hide (sth) away, to vilify, (loanword) to hack (computing)...
角落: nook, corner...