Translation
thirteen
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Examples
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He lived on the island for thirteen years.
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Thirteen ships came into the harbour.
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Thirteen soldiers received wounds.
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After thirteen days they took the city.
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My daughter is thirteen years old.
Tredecim is tres and decem, three and ten, with the s lost in the join. Tres declines on its own, but tredecim does not: it stays the same in every case, and the noun carries the grammar.
The ordinal is tertius decimus, "thirteenth", built from two ordinals side by side, and both halves decline: tertio decimo anno, "in the thirteenth year". That pattern holds for the ordinals of thirteen to seventeen; eighteenth and nineteenth are usually the subtractive duodevicesimus and undevicesimus.
Where this fits
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Latin · Free printables
tredecim: worksheet, infographic and listicle
Free printable study downloads for the Latin word "tredecim" (thirteen): a worksheet with the answer key built in, an infographic, and a sentence listicle. Open any one to view, print or save.
This word is taught in chapter 1, lesson 11: tredecim, sine, tunc and 11 more words.