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"

片跛[katachinba] lame
跛行[hakou] limp
跛行景気[hakoukeiki] spotty economic boom

跛を引く[bikkowohiku] to limp
跛行婚[hakoukon] international marriage which is recognized in only one party's country (e.g. same-sex marriage, polygamy, underage marriage)