trn

See also: trň and tŕň

Translingual

Etymology

Abbreviation of English Trinitario.

Symbol

trn

2. (international standards) ISO 639-3 language code for Trinitario.

See also

• Wiktionary’s coverage of Trinitario terms

English

Symbol

trn

2. Trillion.

   Alternative form: tn

   Meronym: bn

   2. (usually) Trillion short scale.

      Alternative forms: tn, T

      Meronyms: mn, mln, M < bn, bln, B

      • 2025 July 31, Reporting staff, “Who will pay for the trillion-dollar AI boom? A technological revolution meets a financial one”, in The Economist‎^[1], archived from the original on 31 July 2025:

        This year companies will spend $400bn on the infrastructure needed to run artificial-intelligence (AI) models. Predictions of the eventual bill are uniformly enormous. Analysts at Morgan Stanley reckon $2.9trn will be spent on data centres and related infrastructure by the end of 2028; consultants at McKinsey put it at $6.7trn by 2030. Like a bad party at a good restaurant, nobody is quite sure who will pick up the tab.

   4. (rare) Trillion long scale.

      Alternative form: tn

      Meronyms: mn, mln, M < bn, bln, B < tn, T

Czech

Etymology

Inherited from Old Czech trn, from Proto-Slavic *tьrnъ, from Proto-Balto-Slavic *tirnas, from Proto-Indo-European *tr̥nós. Compare Slovak tŕň, Slovene tŕn (tonal orthography), Serbo-Croatian tȓn, Russian тёрн (tjorn), German Dorn, English thorn.

Pronunciation

• IPA^(key): [ˈtr̩n]

Noun

trn m inan

1. thorn (protective spine of a plant)
2. (engineering) center, spike, pin (a pointy part used e.g. to hold another object in a machining tool)

Declension

Declension of trn (hard masculine inanimate)

	singular	plural
nominative	trn	trny
genitive	trnu	trnů
dative	trnu	trnům
accusative	trn	trny
vocative	trne	trny
locative	trně, trnu	trnech
instrumental	trnem	trny

Derived terms

• trnitý
• trní
• trnovník
• trnový

Further reading

• “trn”, in Příruční slovník jazyka českého (in Czech), 1935–1957
• “trn”, in Slovník spisovného jazyka českého (in Czech), 1960–1971, 1989
• “trn”, in Internetová jazyková příručka (in Czech), 2008–2026

Serbo-Croatian

Etymology

Inherited from Proto-Slavic *tьrnъ, from Proto-Balto-Slavic *tirnas, from Proto-Indo-European *tr̥nós.

Cognates

Cognate with Bulgarian трън (trǎn), Czech trn, Slovak tŕň, Slovene tŕn (tonal orthography), Russian тёрн (tjorn) and терние (ternije). Non-Slavic cognates include English thorn, Sanskrit तृण (tṛ́ṇa, “grass”).

Pronunciation

• IPA^(key): /tr̂ːn/

Noun

tȓn m inan (Cyrillic spelling тр̑н)

1. thorn (protective spine of a plant)

Declension

Declension of trn

	singular	plural
nominative	tȓn	tȑnovi
genitive	trna	trnova
dative	trnu	trnovima
accusative	trn	trnove
vocative	trne	trnovi
locative	trnu	trnovima
instrumental	trnom	trnovima

Derived terms

• tȓnje

Further reading

• “trn”, in Hrvatski jezični portal [Croatian language portal] (in Serbo-Croatian), 2006–2026