膝蓋骨[shitsugaikotsu] kneecap
膝蓋腱反射[shitsugaikenhansha] kneecap (patellar) reflex
膝関節[shitsukansetsu] knee joint
膝がしら[hizagashira] kneecap
片膝[katahiza] one knee

諸膝[morohiza] both knees
膝小僧[hizakozou] kneecap
膝許[hizamoto] near one's knee
膝行[shikkou] moving forward by sliding on one's knees (in the presence of high-ranking individuals)

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"