a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

Japanese-Japanese dictionary

dark matter

(construction, architecture) The large, central pillar that holds up a traditional Japanese house. / The breadwinner of a household or organization.

a patriot (person who loves, supports and defends their country)

The Kingdom of Denmark

The Kingdom of Norway

an accident resulting in a personal injury or death; often a traffic injury

serious, deep, heavy (topic), profound (change), weighty (matter)

state ownership, national ownership