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PlainSpell

flask

/ˈflæsk/noun, verb

flask is spelled F-L-A-S-K: 5 letters and one syllable. It appears 1.6 times per million words in written English, the 22,362nd most frequent word form (wordfreq, 2021 data). As a noun, flask means “A narrow-necked vessel of metal or glass, used for various purposes; as of sheet metal, to carry gunpowder in; or of wrought iron, to contain…” (English Wiktionary, September 2026). The plural of flask is flasks.

How many letters and syllables are in flask?

Letters5: F-L-A-S-K
Syllables1 (from its American pronunciation)
In writing1.6 times per million words; the 22,362nd most frequent word form
Wrong spellings searchednone measured in search
Rhymes with

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is flask?

Flask appears 1.6 times per million words in written English, the 22,362nd most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How do you pronounce flask?

  • UK /ˈflɑːsk/
  • /flask/
  • US /ˈflæsk/

Flask has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-flask.ogg, Wikimedia Commons (author and licence on each file's page).

What rhymes with flask?

8 words on PlainSpell end in the same sounds as flask from its last stressed vowel (/æsk/):

Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).

Forms of flask

  • flasks plural, present, singular, he/she/it
  • flasking participle, present
  • flasked participle, past

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does flask mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    A narrow-necked vessel of metal or glass, used for various purposes; as of sheet metal, to carry gunpowder in; or of wrought iron, to contain quicksilver; or of glass, to heat water in, etc.

  2. 2

    A container used to discreetly carry a small amount of a hard alcoholic beverage; a pocket flask.

  3. 3

    Laboratory glassware used to hold larger volumes than test tubes, normally having a narrow mouth of a standard size which widens to a flat or spherical base.

  4. 4

    A container for holding a casting mold, especially for sand casting molds.

  5. 5

    A bed in a gun carriage.

  6. 6

    A nuclear flask, a large, secure lead-lined container for the transport of nuclear material.

  7. 7

    A small bottle of liquor.

verb

  1. 1

    To invest a denture in a flask so as to produce a sectional mold.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Flask in Spanish, French, German and Portuguese

LanguageWords
Frenchflacon, flasque (container for a small amount of beverage), fiole (laboratory glassware)
GermanFlasche (container for a small amount of beverage), Kolben, Flakon (laboratory glassware), Flachmann, Taschenflasche (container to carry a small amount of alcoholic…), Formkasten (container for holding a (sand) casting mold)
Portuguesefrasco (container for a small amount of beverage)
Spanishpetaca, licorera disfrazada (container for a small amount of beverage), matraz, redoma (laboratory glassware)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does flask come from?

From Middle English flask, flaske (“case, cask, keg”), from Old English flasce, flaxe (“bottle, flask”) and Medieval Latin flascō (“bottle”); from Frankish *flaskā; both from Proto-Germanic *flaskǭ (“braid-covered bottle, wicker-enclosed jug”), from Proto-Indo-European *ploḱ-skō (“flat”), or from Proto-Indo-European *pleḱ- (“to weave”). Doublet of fiasco, flacon, and flagon. Related to Dutch fles; also German Low German Flaske, Fless, German Flasche, Danish flaske; also Lithuanian plókščias, Czech ploský, Albanian flashkët.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

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