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

鎌止め[kamadome] cutting grass and trees is prohibited
鎌首[kamakubi] sickle-shaped neck (e.g. snake, praying mantis)
鎌倉時代[kamakurajidai] Kamakura period (1185-1333 CE)
鎌足[kamaashi] legs bowed in
鎌鼬[kamaitachi] type Japanese folkloric monster (yokai), thought to be a trio of weasels who appear in a whirlwind to cut their victim

鎌切[imojiri] praying mantis (esp. the narrow-winged mantis, Tenodera angustipennis)
鎌形[kamagata] sickle-shaped
鎖鎌[kusarigama] sickle and chain (weapon)
鎌をかける[kamawokakeru] to trick someone (into confirming or revealing the truth)