*lab-du

very

Tungus-Manchu: *lab-du
Korean: *năboi
Japanese: *nàpǝ́
Comments: SKE 162, Martin 226, АПиПЯЯ 68, Doerfer MT 144 (Mo < TM).
Russian meaning: очень
Khakassian: jaba
Tuva: čā, čab-čā