staying overnight / lodging

wide / extensive / abundant / profuse / learned / expert / versatile

hundred

Washington, D.C. (a city, the capital city of the United States)

kill two birds with one stone, do one task and finish two or more goals (literally, “one stone, two birds”)

an Atlantic puffin

(idiomatic) in the land of the blind, the one-eyed man is king

a northern cassowary (Casuarius unappendiculatus)

(mathematics) geometrical

"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).