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

偉挙[ikyo] excellent deeds
一挙[ikkyo] one effort
一挙一動[ikkyoichidou] one's every action
一挙手一投足[ikkyoshuittousoku] slight effort
一挙両得[ikkyoryoutoku] killing two birds with one stone

一斉検挙[isseikenkyo] wholesale arrest
科挙[kakyo] Chinese higher civil service examinations
快挙[kaikyo] brilliant achievement
旗挙[hataage] raising an army
挙げた[ageta] brought up (e.g. topic)