Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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No pronunciation record was provided for this word.
noun
A cylindrical recess, typically machined at the mouth of a hole to admit a screw (such as a cap screw) so that the screw sits flush with a surface.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The cutter used to cut such a recess. (Also used, at less depth, for spotfacing.)
Definition source: English Wiktionary via Wiktextract
Synonyms: none provided
Antonyms: none provided
Broader terms: cutter, cutting tool
verb
To create such a cylindrical recess.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
a bit for enlarging the upper part of a hole
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: countersink, countersink bit
Antonyms: none provided
Broader terms: bit
History
Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *-teros Proto-Italic *-teros Proto-Italic *komterosder. Proto-Italic *komterād Latin contrāder. Old French contre- Anglo-Norman countre-bor. Middle English counter- English counter- Proto-Indo-European *bherH-der. Proto-Germanic *burōną Proto-West Germanic *borōn Old English borian Middle English boren English bore English counterbore From counter- (“against”) + bore (“hole”).
Across languages
8 source translations are retained for this English entry.
