手水

By surface analysis, 手 (te, “hand”) +‎ 水 (mizu, “water”).

• (Tokyo) てみず [téꜜmìzù] (Atamadaka – [1])^[1][2]
• IPA^(key): [te̞mʲizɨ]

手(て)水(みず) • (temizu) 

1. Washwater, water used for washing one's hands.
2. The use of water to moisten mochi when kneading it.
3. The water used for doing so.

Shift from 手(て)水(みず) (temizu) above.^[3]

• (Tokyo) ちょーず [chóꜜòzù] (Atamadaka – [1])^[2][1]
• IPA^(key): [t͡ɕo̞ːzɨ]

手水(ちょうず) • (chōzu) 

1. Washwater, water used for washing one's hands.
2. (euphemistic) The act of excretion or going to the washroom.
   1. feces or urine

      Synonym: 大小便 (daishōben)

3. A lavatory. (toilet, bathroom, etc.)

   手(ちょう)水(ず)を使(つか)う

   chōzu o tsukau

   to use the lavatory

   Synonym: 厠 (kawaya)