地下【ちか】
underground, below the ground, world of the dead, the grave, underground (activities, movement, etc.), secret, illegal, in hiding
低下【ていか】
fall, decline, lowering, deterioration, degradation
下車【げしゃ】
alighting (from a train, bus, etc.), getting off, getting out (of a car)
以下【いか】
not exceeding ..., not more than ..., ... and under, ... and below, ... or fewer, below (a standard, level, etc.), under, beneath, less than, the following, the below-mentioned, the rest, followed by ..., including ..., ... and other (employees, officials, etc.)
陛下【へいか】
Your Majesty, His Majesty, Her Majesty
上下【じょうげ】
top and bottom, high and low, above and below, upper and lower ends, up and down, going up and down, rising and falling, fluctuating, going and coming back, upper and lower classes, ruler and ruled, the government and the people, first and second volumes
地下鉄【ちかてつ】
subway, metro, underground (railway)
下旬【げじゅん】
last third of a month, 21st to the last day of a month
値下げ【ねさげ】
price reduction, price cut, reduction in price, markdown
天皇陛下【てんのうへいか】
His Majesty the Emperor
下げる【さげる】
to hang, to suspend, to wear (e.g. decoration), to lower, to reduce, to bring down, to demote, to move back, to pull back, to clear (plates), to remove (food, etc. from table or altar), to keep on playing after one has formed a scoring combination with captured cards
下り【くだり】
down-train, train heading toward the ending point of its route, down-slope, downward going, downbound (esp. away from Tokyo), downstream, downhill
部下【ぶか】
subordinate person
傘下【さんか】
affiliated with, under jurisdiction of, under the umbrella
下町【したまち】
low-lying part of a city (usu. containing shops, factories, etc.), Shitamachi (low-lying area of eastern Tokyo near Tokyo Bay, incl. Asakusa, Shitaya, Kanda, Fukugawa, Honjo, Nihonbashi, Kyobashi and surrounds)
廊下【ろうか】
corridor, hallway, passageway
下着【したぎ】
underwear, undergarment, underclothes, lingerie
目下【めした】
subordinate, subordinates, inferior, inferiors, junior
天下【てんか】
the whole world, the whole country, society, the public, supremacy over a nation, government of a country, the ruling power, having one's own way, doing as one pleases, peerless, incomparable, superlative, world-famous, shogun (Edo period)
下さい【ください】
please (give me), please (do for me)