castan

Borrowed from Latin castaneus (19th century), possibly earlier via Ancient Greek κᾰ́στᾰνᾰ (kắstănă). The Aromanian (cãstãnj) and Megleno-Romanian equivalents of the word are likely directly inherited from Latin.

castan m (plural castani)

1. chestnut tree

• “castan”, in DEX online—Dicționare ale limbii române (Dictionaries of the Romanian language) (in Romanian), 2004–2025

From Old Irish castán (compare modern Irish castán), from Latin castanea or Old French chastaigne (modern French châtaigne), with influence from the native suffix -án.

• IPA^(key): /kʰas̪t̪an/

castan m (genitive singular castain, plural castanan)

1. chestnut (nut)

• Edward Dwelly (1911) “castan”, in Faclair Gàidhlig gu Beurla le Dealbhan [The Illustrated Gaelic–English Dictionary]‎^[1], 10th edition, Edinburgh: Birlinn Limited, →ISBN
• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “castán”, in eDIL: Electronic Dictionary of the Irish Language

Inherited from Middle Welsh kastan, from Latin castanea.

• IPA^(key): /ˈkasdan/, [ˈkastan]

castan f (plural castanau)

1. chestnut

• castanwydd, pren castan (“chestnut tree”)

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “castan”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies