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)

antacid, gastric antacid

antibacterial (antibacterial drug)

contraceptive medicine, a contraceptive agent

string bean