From 切れ (kire, "piece," "bit," "strip," "slice").
切(き)れ切(ぎ)れ • (kiregire) -na (adnominal 切(き)れ切(ぎ)れな (kiregire na), adverbial 切(き)れ切(ぎ)れに (kiregire ni))
切(き)れ切(ぎ)れ • (kiregire)