書籍: book

(dialectal) Clipping of じっちゃん (jitchan, “grandpa; granddaddy; old man”).

Alternative form of 爺ちゃん (jī-chan, “grandpa; granddaddy; old man”)

(colloquial) Alternative form of 全く

(verb suffix, dialect) Alternative form of るから

to become; to change into

核融合炉: fusion reactor

(physics) short for 原子核融合 (genshikaku yūgō): (atomic) nuclear fusion / (biology) karyogamy, the fusion of cellular nuclei when a sperm cell meets an egg cell

a pentagon

passing (as in a test) / suitability, eligibility