Vocabulary consisting only from characters you are able to read
根性
こんじょう
will-power, guts, temper, nature, spiritsuru
調査
ちょうさ
investigation, examination, inquiry, enquiry, surveyjlpt3, suru
巣
す
(1)nest, rookery, breeding place, hive, (2)den, (3)haunt, (4)(spider's) web doubutsu