Vocabulary consisting only from characters you are able to read
地下道
ちかどう
subterranean tunnelmix
兆
ちょう
(1)sign, omen, indication, portent, (num) (2)10^12, 1,000,000,000,000, trillion (American), (obs) billion (British) mix
凡そ
およそ
(uk) about, roughly, as a rule, approximately; (uk) about, roughly, as a rule, approximatelymix