1. Root
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kreph₁, kreph₂, kreph₃, kʷreph₁, kʷreph₂, kʷreph₃, kleph₁, kleph₂, kleph₃, kʷleph₁, kʷleph₂, kʷleph₃
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4. Formally comparable roots
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1.kerh₁, 1.kerh₂, 1.kerh₃, 1.kert, 1.kreu̯h₁, 1.kreu̯h₂, 1.kreu̯h₃, 1.kel, 1.ker, 1.kel, 1.kers, 2.kal, 2.kel, 2.keld, 2.kerh₁, 2.kerh₂, 2.kerh₃, 2.kers, 2.kreu̯h₂, 2.kert, 2.kʷert, 2.kel, 2.ker, 3.kel, 3.kerh₁, 3.kerh₂, 3.kerh₃, 4.kel, 5.kel, krei̯h₁, krei̯h₂, krei̯h₃, kʷrei̯h₁, kʷrei̯h₂, kʷrei̯h₃, kreph₁, kreph₂, kreph₃, kʷreph₁, kʷreph₂, kʷreph₃, kal, kar, kars, kel, kelb, keld, kelh₁, kelh₂, kelh₃, kelh₂, kelp, keldʰ, kelt, kar, ker, kleh₁, klep, kleu̯b, kleu̯h₁, kleu̯h₂, kleu̯h₃, kreh₁, kreh₁i̯, kreh₂, kret, kreu̯s, kreḱ, klemh₁, klemh₂, klemh₃, kremh₁, kremh₂, kremh₃, kʷlemh₁, kʷlemh₂, kʷlemh₃, kʷremh₁, kʷremh₂, kʷremh₃, krend, kʷlend, kʷelh₁, kʷels, kʷer, kerd, kʷerd, kʷerph₁, kʷerph₂, kʷerph₃, kerḱ, kʷerḱ, kleh₂, kʷleh₂, klei̯ḱ, kʷlei̯ḱ, klenk, klenkʷ, kʷlenk, kʷlenkʷ, kʷrei̯h₂, krei̯p, kʷrei̯p, kelh₁, kerb, kerbʰ, kerh₁, kerh₂, kerh₃, kerp, kers, kert, kreb, krengʷ, krei̯, kʷrei̯, kelh₁, kleh₂u̯, kleh₃dʰ, kremh₁, kremh₂, kremh₃
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