дупка

Diminutive of ду́па (dúpa, “gap, indention”) (mostly obsolete) +‎ -ка (-ka).

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ду́пка • (dúpka) f (diminutive ду́пчица)

1. hole, pit

   Synonyms: я́ма (jáma), трап (trap)

2. gap, skip

   Synonyms: про́пуск (própusk), пролу́к (prolúk)

3. aperture, port, slot (opening where another element is supposed to fit)

   Synonyms: отво́р (otvór), отвъ́рстие (otvǎ́rstie)

4. (colloquial) cave, cavity, chasm (usually vertical)

   Synonym: пещера́ (pešterá)

   Те́мната ду́пка ― Témnata dúpka ― Dark Hole (cave in Western Balkan Mountains)

   Ра́йчова ду́пка ― Rájčova dúpka ― Rajchov Hole (cave in Central Balkan Mountains)

   Ха́рамийска дупка ― Háramijska dupka ― Haramija Hole (cave in Western Rhodope Mountains)

• ду́пча (dúpča, “to hole, to puncture”)
• ду́пчест (dúpčest, “riddled with holes”)

• ду́пе (dúpe, “asshole”)
• дупина́ (dupiná, “aperture”) (obsolete)
• дъ́но (dǎ́no, “bottom”)

• “дупка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• “дупка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010
• дупка in Терминология на карста и спелеологията в България (1976)

Inherited from Proto-Slavic *dupa.

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дупка • (dupka) f (plural дупки, diminutive дупче)

1. hole, cavity, gap
2. (slang) a person with no knowledge or skills (in a particular domain)