丹念: assiduity; diligence; application

丹念: careful; painstaking; elaborate

炭安: ammonium carbonate

(slang) Alternative form of ちゃん (“-chan”); -tan

短期: short term / 短気: short temper / 単機: lone plane, airplane flying by itself / 単騎: lone horseman / 単記: single (ballot)

importance

source of supply

A male given name of historical usage

source of infection

(slang); Short for 源氏物語 (Genji Monogatari): The Tale of Genji, a novel by Murasaki Shikibu / Short for 光源氏 (Hikaru Genji): the titular protagonist of the novel / a placename / a surname