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"

月遅れ[tsukiokure] a month or older
遅れをとる[okurewotoru] to fall behind
今や遅しと[imayaososhito] impatiently
手遅れ[teokure] being (too) late
出し遅れ[dashiokure] belated

出遅れる[deokureru] to get a late start
乗り遅れる[noriokureru] to miss (train, bus, etc.)
申し遅れる[moushiokureru] to be slow in saying
足が遅い[ashigaosoi] to be slow-footed
遅い[osoi] slow