fail to honour (a debt or obligation incurred through a promise or agreement)
未能遵守（诺言）；未能偿还（债务）；逃避履行（义务）
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banks began welshing on their agreement not to convert dollar reserves into gold .银行开始拒绝履行不把美元兑换成黄金的协议。
of or relating to Wales, its people, or their Celtic language
（与）威尔士（有关）的；（与）威尔士人（有关）的；（与）威尔士语（有关）的。
[mass noun]the Celtic language of Wales, spoken by about 500,000 people (mainly bilingual in English). Descended from the Brythonic language spoken in most of Roman Britain, it has been strongly revived after a long decline.
威尔士语（威尔士的凯尔特语，有约５００，０００使用者，多数为也会英语的双语者；该语言源于罗马统治英国时多数地区讲的布里索尼语；在长期的衰落之后，已经得到了很大复兴）。
[as plural noun
［总称］威尔士人。
" mid 19th cent.: of unknown origin． Old English