καπνός

Ancient Greek

From Proto-Hellenic *kapnós, from Proto-Indo-European *kwep- (“to smoke, boil, move violently”), which appears to be a European substrate word;^[1] see also Lithuanian kūpėti (“to boil over”), Old Church Slavonic кꙑпѣти (kypěti, “to boil”), Sanskrit कुप्यति (kupyati, “become agitated, bubbles up”), Latin cupiō.^[2]

καπνός • (kapnós) m (genitive καπνοῦ); second declension

Case / #	Singular	Dual	Plural
Nominative	ὁ κᾰπνός ho kăpnós	τὼ κᾰπνώ tṑ kăpnṓ	οἱ κᾰπνοί hoi kăpnoí
Genitive	τοῦ κᾰπνοῦ toû kăpnoû	τοῖν κᾰπνοῖν toîn kăpnoîn	τῶν κᾰπνῶν tôn kăpnôn
Dative	τῷ κᾰπνῷ tôi kăpnôi	τοῖν κᾰπνοῖν toîn kăpnoîn	τοῖς κᾰπνοῖς toîs kăpnoîs
Accusative	τὸν κᾰπνόν tòn kăpnón	τὼ κᾰπνώ tṑ kăpnṓ	τοὺς κᾰπνούς toùs kăpnoús
Vocative	κᾰπνέ kăpné	κᾰπνώ kăpnṓ	κᾰπνοί kăpnoí
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.

^ Beekes, Robert S. P. (2010) “καπνός”, in Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN, pages 638-9
^ Roberts, Edward A. (2014) A Comprehensive Etymological Dictionary of the Spanish Language with Families of Words based on Indo-European Roots, Xlibris Corporation, →ISBN

καπνός • (kapnós) m (plural καπνοί m pl or καπνά n pl)

(plural καπνοί) smoke
δεν υπάρχει καπνός χωρίς φωτιά ― den ypárchei kapnós chorís fotiá ― there is no smoke without fire
(plural καπνά) tobacco (plant and its products)

The 'tobacco' sense has the neuter nominative/accusative/vocative plural form καπνά n pl (kapná).

καπνός, in Λεξικό της κοινής νεοελληνικής [Dictionary of Standard Modern Greek], Triantafyllidis Foundation, 1998 at the Centre for the Greek language