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Question 1

nugatory

Answer 1

adj. trifling;（取るに足りない、つまらない）; invalid（価値のない、根拠のない）

Question 2

obdurate

Answer 2

adj. stubborn

Question 3

obsequious

Answer 3

adj. overly submissive

Question 4

obsequy

Answer 4

n. funeral ceremony (often used in the plural, obsequies)

Question 5

obviate

Answer 5

v. to make unnecessary; to anticipate and prevent

Question 6

occlude

Answer 6

v. to shut; block

Question 7

occult

Answer 7

adj. relating to practices connected with supernatural phenomena

Question 8

odyssey

Answer 8

n. a long, adventurous voyage; a quest

Question 9

officious

Answer 9

adj. too helpful; meddlesome（おせっかいな）

Question 10

olfactory

Answer 10

adj. concerning the sense of smell