涙

涙 (Kangxi radical 85, 水+7, 10 strokes, cangjie input 水戈尸大 (EISK) or 水一尸大 (EMSK), four-corner 3318₄, composition ⿰氵戻)

• 淚 (Traditional Chinese and kyūjitai form)

• Kangxi Dictionary: not present, would follow page 627, character 31
• Dai Kanwa Jiten: character 17573
• Hanyu Da Zidian (first edition): not present, would follow volume 3, page 1634, character 6
• Unihan data for U+6D99

(Jōyō kanji, shinjitai kanji, kyūjitai form 淚)

1. tears

• Go-on: るい (rui, Jōyō)^{←るい (rui, historical)←るゐ (rwi, ancient)}
• Kan-on: るい (rui, Jōyō)^{←るい (rui, historical)←るゐ (rwi, ancient)}
• Tō-on: れい (rei)
• Kun: なみだ (namida, 涙, Jōyō)

From Old Japanese. Ultimately from Proto-Japonic *namita.

Attested in the Nihon Shoki with the man'yōgana spelling 那(な)瀰(み)多(た) (namita). The Kojiki and Man'yōshū have 那(な)美(み)多(た) (namita),^[1] and the Man'yōshū also has later instances where the 多(た) (ta) was replaced with 太(だ) (da), forming 奈(な)美(み)太(だ) (namida),^[2] indicating a phonetic change over time from namita to namida.

Ultimate derivation unknown. There are interesting phonetic and semantic similarities with Thai น้ำตา (nám-dtaa, “tear”, literally “water + eye”), overlapping semantically with Korean 눈물 (nunmul, “tear”, literally “eye + water”), perhaps pointing to an ancient prehistoric borrowing. Alexander Vovin lists it among "naturalized loanwords from Korean".^[3] However, such similarities may also be purely accidental.

• (Tokyo) なみだ [náꜜmìdà] (Atamadaka – [1])^[4]
• IPA^(key): [na̠mʲida̠]

涙(なみだ) • (namida) 

1. tear, teardrop

涙(なみだ)する • (namida suru) suru (stem 涙(なみだ)し (namida shi), past 涙(なみだ)した (namida shita))

1. to cry, to weep

/namida/ → /nanda/

Alteration of namida above.^[5][4][6]

• (Tokyo) なんだ [náꜜǹdà] (Atamadaka – [1])^[4]
• IPA^(key): [nã̠nda̠]

涙(なんだ) • (nanda) ^{←なむだ (namuda)?}

1. tear, teardrop

Alteration of namida or nanda above. Used during the Edo period in the rough informal speech used by the staff and servants of samurai households, and others of lower social rank.^[5][4][6]

• (Tokyo) なだ [náꜜdà] (Atamadaka – [1])
• IPA^(key): [na̠da̠]

涙(なだ) • (nada) 

1. (archaic, possibly obsolete) tear, teardrop

• 泣(な)く (naku, “to cry”)

• “涙”, in 漢字ぺディア [Kanjipedia]‎^[2] (in Japanese), The Japan Kanji Aptitude Testing Foundation, 2015–2026