行けない[ikenai] wrong
行る[yaru] to send
オリエント急行[orientokyuukou] Orient express
カ行[kagyou] classification for Japanese verb with the dictionary form ending in "ku"
ガ行[gagyou] classification for Japanese verb with the dictionary form ending in "gu"

サ行[sagyou] classification for Japanese verb with the dictionary form ending in "su"
ザ行[zagyou] classification for Japanese verb with the dictionary form ending in "zu"
スパイ行為[supaikoui] espionage
タ行[tagyou] classification for Japanese verb with the dictionary form ending in "tsu"
ダ行[dagyou] classification for Japanese verb with the dictionary form ending in "dzu"

対蹠地[taisekichi] the antipodes
対蹠的[taishoteki] diametrically opposed
蹠骨[shokotsu] metatarsal
蹠行性[shokousei] plantigrade (walking on the soles of the feet)

対蹠[taiseki] antipodal
対蹠的[taisekiteki] antipodal
足蹠[sokuseki] sole (of the foot)