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

蝦蟇[gama] toad (esp. the Japanese toad, Bufo japonicus)
蟇股[kaerumata] curved wooden support on top of the main beam of a house, now mainly decorative (shape evocates an open-legged frog)
蟇口[gamaguchi] purse with a metal clasp
大蟇[oohikigaeru] cane toad
ヨーロッパ蟇[yooroppahikigaeru] common toad (Bufo bufo)

宮古蟇[miyakohikigaeru] Miyako toad (Bufo gargarizans miyakonis, a subspecies of the Asiatic toad endemic to the Ryukyu Islands)
アジア蟇[ajiahikigaeru] Asiatic toad (Bufo gargarizans)
谷蟇[taniguku] Japanese toad (Bufo japonicus)
蝦蟇鮟鱇[gamaankou] toadfish (any fish of family Batrachoididae, esp. the Pacuma toadfish, Batrachoides surinamensis)
蟇目[hikime] large, perforated, turnip-shaped arrowhead cover made of Japanese bigleaf magnolia or paulownia