jedenadvacet / jednatřicet

Twenty-one Type Numerals

Level 4

In Czech, numbers like 21, 31, or 41 can be expressed as a single inverted word (e.g., jedenadvacet instead of dvacet jedna). While they mean the exact same number, their grammar is completely different.

How It Works

1. Scope and Formation
This 'units + a + tens' pattern applies to numbers with non-zero units from 21 to 99 (21–29, 31–39, etc., e.g., pětadvacet for 25, třiadevadesát for 93). It also scales up to higher numbers (e.g., sto pětadvacet for 125). Note that jednadvacet (dropping the middle 'e') is an equally standard and very common variant of jedenadvacet. As a spelling rule, these inverted numbers are always written as a single word (jedenadvacet). Standard-order numbers are normally written as separate words (dvacet jedna), with the exception of financial documents, checks, and postal orders, where they are written as a single word to prevent forgery.

2. Noun and Verb Agreement
When using jedenadvacet (21), dvaadvacet (22), jednatřicet (31), etc., in the nominative, accusative, or vocative case, the noun is in the genitive plural: jedenadvacet korun (not koruna). The verb takes the neuter singular form: Přišlo jedenadvacet hostů.

3. Declension in Oblique Cases
These one-word numerals are highly popular in everyday speech because they are much easier to decline than their multi-word equivalents. In all oblique cases (genitive, dative, locative, and instrumental), the numeral has exactly one invariant form ending in -i (or the less common variant -íti), while the noun declines normally: s jedenadvaceti hosty (instrumental). This avoids the clunky multi-word declension (e.g., s dvaceti jedním hostem). Note that leaving the multi-word numeral completely uninflected (e.g., s dvacet jedna hosty) or using a partially inflected 'hybrid' form where the tens are inflected but the units are frozen (e.g., s dvaceti jedna hosty) is common in everyday spoken Czech, but these forms are not officially accepted in strict standard Czech (spisovná čeština). The one-word form remains the most elegant and standard solution.

4. Gender Neutrality
A massive advantage of inverted one-word numerals is that they are completely gender-neutral (jedenadvacet mužů, jedenadvacet žen, jedenadvacet aut). While traditional multi-word forms can match the gender of the noun (e.g., dvacet jeden muž, dvacet jedna žena, dvacet jedno auto), modern Czech actually prefers using the uninflected dvacet jedna with the genitive plural for all genders (e.g., dvacet jedna mužů), making both approaches gender-neutral in practice.

5. Register and Usage
Don't let the English literal translation 'one-and-twenty' fool you—these forms are not archaic! They are completely standard, neutral, and extremely common in spoken Czech, especially when talking about age, prices, and time.

6. The Difference from Dvacet jedna
While dvacet jedna traditionally takes a singular noun (dvacet jedna koruna), modern standard Czech also allows it to act as an uninflected quantifier taking the genitive plural (dvacet jedna korun). When used this way as a subject, the verb must also take the neuter singular form (Přišlo dvacet jedna mužů, not Přišli...). This means that in the nominative and accusative, dvacet jedna and jedenadvacet can often be used as grammatical drop-in replacements. However, a crucial difference appears with numbers 22, 23, and 24: while the inverted forms strictly require the genitive plural (dvaadvacet mužů), the multi-word equivalents traditionally take the nominative plural (dvacet dva muži, dvacet dvě ženy).

7. Pronunciation and Word Stress
Because these are long compound words, learners often mistakenly place the stress in the middle. However, standard Czech word stress remains strictly on the first syllable: JE-den-a-dva-cet, PĚT-a-dva-cet.

8. Restriction with Decimals
There is a strict rule regarding decimal numbers: the inverted 'units + a + tens' pattern cannot be used for reading decimals. For example, 0.25 must be read as nula celá dvacet pět, never nula celá pětadvacet.

Examples (4)

  1. Přišlo jedenadvacet hostů.

    Twenty-one guests arrived.

    Word by Word: Arrived one-and-twenty guests.

    The numeral forces the noun 'hostů' into the genitive plural, and the verb 'přišlo' takes the neuter singular form.

  2. To jablko stálo jedenadvacet korun.

    That apple cost twenty-one crowns.

    Word by Word: That apple cost one-and-twenty crowns.

    Inverted numerals are extremely common for prices. Notice the genitive plural 'korun'.

  3. Bydlíme tady už jednatřicet let.

    We have been living here for thirty-one years.

    Word by Word: We live here already one-and-thirty years.

    Used naturally for durations of time, requiring the genitive plural 'let'.

  4. Mluvil jsem s dvaadvaceti studenty.

    I spoke with twenty-two students.

    Word by Word: Spoke I am with two-and-twenty students.

    In oblique cases (here, the instrumental after 's'), the numeral takes the ending '-i' and agrees with the noun's case.

Common Mistakes

  • Using a singular noun after the inverted numeral.

    To stojí jedenadvacet koruna.
    To stojí jedenadvacet korun.

    Even though it contains 'jeden' (one), inverted numerals like jedenadvacet act like numbers 5 and up, strictly requiring the noun to be in the genitive plural.

  • Using a plural verb when the numeral phrase is the subject.

    Jedenadvacet hostů přišli.
    Jedenadvacet hostů přišlo.

    When a numeral phrase requiring the genitive plural acts as the subject, the verb must be in the neuter singular (ending in -o in the past tense).

How It Connects

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jedenadvacet / jednatřicetLevel 4Twenty-one Type Numerals

Learn This First

To understand the 'jedenadvacet' numeral type, learners must first be familiar with how higher numerals (5+) govern the genitive plural and require neuter singular verb agreement. It is also helpful to know the standard compound numeral forms (e.g., dvacet jedna) to recognize this inverted alternative.

Words in This Pattern

jednatřicet