Comment: In Arch. the root is reduplicated; the Tsakh., Kryz. and Bud. forms contain preverbs. The original meaning was probably broader, cf. the derived adjective: Tab. urc-ru (Kand. je-cru, Düb. re-cüri), Tsakh. Gelm. hicca-χa-ń (with expressive gemination) 'hot'.