1. Root

 2.drem

2. Lexical meanings

 DE: schlafen
EN: sleep
FR: dormir
RU: дремать

3. Comparative evidence

 Italic, Slavic

4. Formally comparable roots

 1.der, 1.dreh₂, 1.drem, 2.der, 2.dreh₂, derkh₂, derkʷh₂, derḱh₂, derbʰ, derd, derdʰ, derh₁gʰ, derh₂gʰ, derh₃gʰ, derh₂, deru̯, dreu̯, derk, derḱ, dreb, dret, dregʰ, dreh₁, drep, dreu̯, dreu̯g, dreu̯h₁, dreu̯h₂, dreu̯h₃, dreǵʰ

5. Formally/Semantically comparable roots

 derdʰ, dreh₁

6. Revised root variants

 derdʰ, dreh₁

7. Comments

 Proto-Slavic *drēmi̯e- has been interpreted either as *dr-ē-m- < ? *dr-eh1-m- (ESSJa) or as a result of contamination of *dr̥m-i̯e- and *dreh1- (LIV). The contamination scenario suggests that the two extended forms co-existed at a certain stage of the proto-language.

8. References

DELL = Ernout, A., A. Meillet. 1939. Dictionnaire étymologique de la langue latine : histoire des mots. 2 éd. Paris: Klincksieck.

EDL = de Vaan, Michiel. 2008. Etymological dictionary of Latin and the other Italic Languages. Leiden: Brill.

EIEC = Mallory J.P. and D.Q. Adams. 1997. Encyclopedia of Indo-European Culture. London and Chicago: Fitzroy Dearborn Publishers.

ESSJa = Трубачев О.Н. (отв. ред.). 1975‒… Этимологический словарь славянских языков: праславянский лексический фонд.

LIV = Rix, Helmut et al. 2001. Lexikon der indogermanischen Verben: Die Wurzeln und ihre Primärstammbildungen. 2 Aufl. Wiesbaden: Dr. Ludwig Reichert Verlag.

WH = Walde, A., und J.B. Hofmann. 1938. Lateinisches etymologisches Wörterbuch. 2 Bde. Heidelberg: Carl Winter.

Watkins 2011 = Watkins, Calvert. 2011. The American heritage dictionary of Indo-European roots. 3rd revised ed. Boston, New York: Houghton Mifflin Harcourt.