A vow, oath or pledge; an earnest and solemn promise, made to oneself, to another, or to a deity.

to make a vow; to take an oath

(rare, obsolete) trade, transaction

(rare, obsolete) to trade, to engage in trade, particularly internationally

frugal

yakyuken or strip rock paper scissors (a version of Rock-Paper-Scissors where the loser has to remove an article of clothing, accompanied with a song and dance)

epidemic (widespread disease)

get engaged

a glaze or enamel applied to ceramics

drugs, medicines, chemical substances