Reconstruction:Proto-Japonic/itu ~ etu

This Proto-Japonic 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.

This Proto-Japonic entry contains original research. The reconstruction in this entry is based on published research, but the specific form presented here is not found in prior works.

Proto-Japonic

Etymology 1

**Proto-Japonic numbers ^(edit)**
← 4	5	6 →
Cardinal: *itu ~ etu

Possibly cognate with Goguryeo 于次 (ucha).

Numeral

*itu ~ etu

five

Descendants

Old Japanese: 五 (itu)
- Japanese: 五 (itsu)
Proto-Ryukyuan: *etu
- Northern Ryukyuan:
  - Kikai: 五 (itsu)
  - Kunigami: 五 (hichi)
  - Northern Amami Ōshima: 五 (itsï)
  - Okinawan: 五 (ichi)
  - Okinoerabu: 五 (ichi)
  - Southern Amami Ōshima: 五 (itï)
  - Tokunoshima: 五 (itsï)
  - Yoron: 五 (ichi)
- Southern Ryukyuan:
  - Miyako: 五 (itsï)
  - Yaeyama: 五 (itsï)
  - Yonaguni: 五 (ichi)

Etymology 2

Pronoun

*itu ~ etu

when

Descendants

Old Japanese: 何時 (itu)
- Japanese: 何時 (itsu)
Proto-Ryukyuan: *etu
- Northern Ryukyuan:
  - Kikai: 何時 (itsu)
  - Kunigami: 何時 (hichī)
  - Northern Amami Ōshima: 何時 (itsï)
  - Okinawan: 何時 (ichi)
  - Okinoerabu: 何時 (ichī)
  - Southern Amami Ōshima: 何時 (ichi, itī, it)
  - Tokunoshima: 何時 (itsïï)
  - Yoron: 何時 (ichi)
- Southern Ryukyuan:
  - Miyako: 何時 (itsï)
  - Yaeyama: 何時 (itsï)
  - Yonaguni: 何時 (ichi)