빚, 약속, 또는 의무를 이행하지 않고 떼어먹거나 회피하다.
To fail to honor a debt, promise, or obligation, especially by running away without paying (often followed by 'on').
예문:
"After losing the bet, he tried to welsh on his promise to pay the winner."
"The contractor welshed on the deal, leaving the project unfinished and unpaid for."
"If you welsh on your debts, you will quickly lose credibility in the community."