tracelessly การใช้

• Shortly afterwards it was discovered that the corresponding detonator tracelessly disappeared from the case.
• For speedy tagging, it's even worse; an article can vanish almost tracelessly in 15 minutes.
• I assume that the organized crime syndicates that set up the casinos must have ways to make it as easy for someone to win big as it is for someone delivering a payment to arrange to lose everything; otherwise it wouldn't be a very effective way to tracelessly launder money.