Reconstruction:Proto-Indo-European/dwi-

This Proto-Indo-European entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

Proto-Indo-European

**Proto-Indo-European numbers ^(edit)**
← 1	2	3 →
Cardinal: dwóh₁ Ordinal: h₂énteros Adverbial: dwís Multiplier: dwiplós, dwoyós Fractional: sēmi Prefix: *dwi-

Etymology

Irregular zero grade form of the numeral *dwóh₁ (“two”).

According to De Vaan, the final *-i perhaps emerged under the influence of *tri- (“three”).^[1] Alternatively, Weiss suggests that it may reflect a substantivized i-stem that once appeared in a compound.^[2]

Prefix

*dwi-^[1]^[3]

two
apart, asunder

Derived terms

Proto-Indo-European terms prefixed with *dwi-

Reconstruction:Proto-Indo-European/wídḱm̥ti

Reconstruction:Proto-Indo-European/h₁weydʰh₁-

Reconstruction:Proto-Indo-European/dwoyós

Reconstruction:Proto-Indo-European/dwiplós

Related terms

*dwís (“twice, doubly”)

Descendants

Proto-Armenian:
- Old Armenian: երկի- (erki-)
Proto-Germanic: *twi- (see there for further descendants)
Proto-Hellenic: *dwi-
- Ancient Greek: δι- (di-)
  - Greek: δι- (di-), δί- (dí-)
Proto-Italic: *dwi- (see there for further descendants)
Proto-Indo-Iranian: *dwi-
- Proto-Indo-Aryan: *dwi-
  - Sanskrit: द्वि (dvi-, “two”) (see there for further descendants)
- Proto-Iranian: *dwi- (see there for further descendants)
*dwoy-
- Proto-Albanian: *duaigā
  - Albanian: degë

References

↑ ^1.0 ^1.1 De Vaan, Michiel (2008), “bi-”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 71: “*dui- 'two'”
^ Weiss, Michael L. (2009), Outline of the Historical and Comparative Grammar of Latin‎^[1], Ann Arbor: Beech Stave Press, →ISBN, page 366: “*du̯i-”
^ Mallory, J. P., Adams, D. Q., editors (1997), Encyclopedia of Indo-European Culture, London, Chicago: Fitzroy Dearborn Publishers, page 400: “*du̯i-”

[EDL-1] 1.0 ^1.1 De Vaan, Michiel (2008), “bi-”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 71: “*dui- 'two'”

[2] Weiss, Michael L. (2009), Outline of the Historical and Comparative Grammar of Latin‎^[1], Ann Arbor: Beech Stave Press, →ISBN, page 366: “*du̯i-”

[3] Mallory, J. P., Adams, D. Q., editors (1997), Encyclopedia of Indo-European Culture, London, Chicago: Fitzroy Dearborn Publishers, page 400: “*du̯i-”

[1]

[2]

[3]