Of unclear origin.
Traditionally compared with Latin carīna (“ship's keel; shell of a nut”) and Sanskrit करक (karaka, “water jar; coconut (shell)”). The Latin term is likely cognate, though whether via borrowing from Greek, a common third source, or via inheritance (traditionally taken as Proto-Indo-European *ker- (“hard”), whose existence has been doubted, including by Beekes) is uncertain, while the Sanskrit term is more dubious, particularly as the "coconut shell" meaning is listed as lexicographic, indicating that it may not have been the primary meaning.
Based on the Hesychian variant ἄρυα (árua, “Heraclitean nut”) displaying a κ-/∅ interchange in the initial, Beekes takes the word as Pre-Greek.[1]
An alternative theory derives the word from Proto-Indo-European *ḱerh₂- (“head”). Cognates include English harns, Old Norse hjarni, Latin cerebrum (all three meaning 'brain') and Avestan 𐬯𐬁𐬭𐬀 (sāra), Persian سر (sar) and Sanskrit शिरस् (śiras) (all three meaning 'head'). See as well κρᾱνίον (krāníon, “skull”), κέρας (kéras, “horn”) and κᾰ́ρᾱ (kắrā, “face”). (Can this(+) etymology be sourced?)
κᾰ́ρῠον • (kắrŭon) n (genitive κᾰρῠ́ου); second declension
Case / # | Singular | Dual | Plural | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nominative | τὸ κᾰ́ρῠον tò kắrŭon |
τὼ κᾰρῠ́ω tṑ kărŭ́ō |
τᾰ̀ κᾰ́ρῠᾰ tằ kắrŭă | ||||||||||
Genitive | τοῦ κᾰρῠ́ου toû kărŭ́ou |
τοῖν κᾰρῠ́οιν toîn kărŭ́oin |
τῶν κᾰρῠ́ων tôn kărŭ́ōn | ||||||||||
Dative | τῷ κᾰρῠ́ῳ tôi kărŭ́ōi |
τοῖν κᾰρῠ́οιν toîn kărŭ́oin |
τοῖς κᾰρῠ́οις toîs kărŭ́ois | ||||||||||
Accusative | τὸ κᾰ́ρῠον tò kắrŭon |
τὼ κᾰρῠ́ω tṑ kărŭ́ō |
τᾰ̀ κᾰ́ρῠᾰ tằ kắrŭă | ||||||||||
Vocative | κᾰ́ρῠον kắrŭon |
κᾰρῠ́ω kărŭ́ō |
κᾰ́ρῠᾰ kắrŭă | ||||||||||
Notes: |
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