פֿאַרבאָרגן
'hidden, concealed (adjective)'

ETYMOLOGY

[Interesting that פֿאַרבערגן is labeled a Germanism and is rare in Yiddish, but the past participle פֿאַרבאָרגן is quite common.]
Got. bairgan 'to preserve, protect, keep', ON bjarga 'to save, help', OE beorgan 'to spare', OS gibergan, Dutch bergen 'to hide; to salvage', OHG bergan 'to protect, hide', far-bërgan, MHG bërgen, verbërgen, NHG bergen 'to contain, retrieve, salvage', verbergen; from PGmc ✱bergan- 'to keep (safe) (perhaps originally: to take to high ground)' < ✱bʰérgʰ-e-; cf. Lithuanian bìrginti 'to save', Old Church Slavonic brěšti 'to care'