歳々年々: year in, year out

(mahjong) big three dragons: a 役満 (yakuman, “limit”) hand with triplets or quads of each of the 三元牌 (sangenpai, “dragon tiles”)

grassland, prairie, savanna / (Internet slang) LOL, LMAO; used to indicate amusement or laughter

modern language / (especially in reference to Japanese) modern Japanese; Japanese in its current form, spoken since the Meiji era and based on the Tokyo dialect

a play focusing on modern events and issues from World War II and up; contemporary drama, a modern play

(fandom slang) in fanwork, placing characters in a modern AU

modern times, variously described as after the 19th century, after World War I, or after World War II, until the present

(military) a generalissimo / (military) a grand marshal

東日本大震災: The Great Eastern Japan Earthquake

最大公約数: greatest common divisor