お大事に[odaijini] take care of yourself
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
伊勢大神宮[isedaijinguu] the Grand Shrines of Ise
伊勢大廟[isetaibyou] the Grand Shrines of Ise
偉大[idai] greatness

医科大学[ikadaigaku] medical school
医大[idai] medical university
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一大[ichidai] one large ...
一大事[ichidaiji] serious affair

がらがら蛇[garagarahebi] rattlesnake
烏蛇[karasuhebi] black snake
錦蛇[nishikihebi] python
黒蛇[kurohebi] blacksnake
縞蛇[shimahebi] pale-yellow snake (non-poisonous)

蛇の目[janome] (umbrella with) bull's-eye (pattern)
蛇口[jaguchi] faucet
蛇行[dakou] meandering
蛇足[dasoku] redundancy

ムール貝[muurugai] moule
一枚貝[ichimaigai] univalve
烏貝[karasugai] cockscomb pearl mussel (Cristaria plicata)
貝ボタン[kaibotan] mother-of-pearl button
貝貨[baika] shell money

貝がら[kaigara] shell
貝柱[kaibashira] adductor muscle
貝毒[kaidoku] shellfish poison
貝類[kairui] shellfish