万劫: an extremely long period of time; eternity

内語: native language; internal language

外語: foreign language; external language

child born to a mother soon after a previous child

五時: five o'clock / 誤字: typo

raw egg

後日: in the future, later, a later day, another day; after the occurrence of some event, etc / 期日: an expected or promised day

ワゴン: a wagon (US), a waggon (UK); a station wagon (US), an estate car (UK) / 和琴, 倭琴: (music) a six-stringed koto or zither used to perform kagura music, more common in ancient times

(Internet slang) place (e.g. hashtag, video, etc.) for people nostalgic of the "Old Internet" to convene

when in Rome, do as the Romans do