Reconstruction:Proto-Slavic/čukati

Morphologically from *čukъ (“bang, clang; hammer, knocker”) +‎ *-ati. Proposed further origin:

• Vasmer, Snoj: Onomatopoeic related to Lithuanian kaũkti (“to howl”), Latvian kàukt (“to yell, to howl”), possibly Sanskrit कौति (káuti, “to cry, to lament”), Ancient Greek κωκῡ́ω (kōkū́ō, “to shriek”). Ultimately may reflect Proto-Indo-European *(s)kew- (“to growl, to wail”). Compare also Proto-Slavic *čavьka (“jackdaw”), Proto-Slavic *skovykъ ⇒ Slovene: skovȋk (“pygmy owl”), Proto-Slavic *čuxalъ ⇒ Bulgarian: чу́хал (čúhal, “scops owl”).
• Possibly an expressive k-extension of *kuti (“to hew”) +‎ *-kati, in particular for the secondary sense “to hammer, to hew”.

*čukati impf (perfective *čuknǫti)

1. to knock, to rattle, to throb

   → to caw, to cackle (in Slovene, East Slavic)

   → to hammer, to strike, to hew (in Eastern South Slavic)

• *čukadlo (“hewing tool, knocker”)
• *čukanъ (“mortar”)

• *čukъ (“hammer”)
• *čuxati (“to growl, to shoo”)
• *kukati (“to cuckoo”)
• *čučati (“to hang/sit on a high place (e.g. tree, pylon)”)
  • *čučedlo (“scarecrow”)
• *čugati (“to trim, to crop”)

• East Slavic:
  • Russian: чу́кать (čúkatʹ) (dialectal)
  • Ukrainian: чу́кати (čúkaty)
• South Slavic:
  • Bulgarian: чу́кам (čúkam)
  • Macedonian: чука (čuka)
  • Slovene: čúkati

• Trubachyov, Oleg, editor (1977), “*čukati”, in Этимологический словарь славянских языков [Etymological Dictionary of Slavic Languages] (in Russian), issue 4 (*čaběniti – *děľa), Moscow: Nauka, page 131
• Snoj, Marko (2016), “čūk”, in Slovenski etimološki slovar³ (in Slovene), https://fran.si: “sorodno z ... glagolom čúkati “oglašati se kot čuk””