clap / (idiomatic) come to an agreement, reach an understanding / (idiomatic) lay the groundwork

to be emotionless; to be indifferent

photograph, copy, replicate, reproduce, transcribe / be photographed / describe

transition, move, change

Kyūjitai form of 抗体 (“antibody”)

Rare spelling of 抗原 (“antigen”).

antitoxin, antivenom

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)