COMMENT: Reconstructed for the PEC level. The vocalism is hard to reconstruct in a trisyllabic root with some irregular phonetic changes (due to the root's expressive nature).
It is interesting to note Azer. dälä 'squirrel' (possibly < *däläg), which has no Turk. etymology and thus may be borrowed from an EC source (the Azer. word, in its turn, is borrowed in Kryz. dälä, Khin. delä 'squirrel').