末永い

Attested from at least the 20th century. Apparently a back-formation of すえながく (suenagaku, “for a long time; forever”).

• (Tokyo) すえながい (Nakadaka – )
• IPA^(key):

末(すえ)永(なが)い • (suenagai) -i (adverbial 末(すえ)永(なが)く (suenagaku))

1. permanent, everlasting, very long time from now

   末永(すえなが)いお幸(しあわ)せに

   suenagai o shiawase ni

   to many years of happiness

   • 1987 May 7, “‘Shinsen’ dōshi de shimai engami: Tōkyo Shibuya no machi to Saitama no mura, shinzen mezasu [‘Shinsen’ region sisterhood: A neighborhood in Shibuya, Tokyo and a village in Saitama pledge goodwill]”, in Yomiuri Shimbun, page 22:

     調(ちょう)印(いん)式(しき)で貫(ぬく)井(い)村(そん)長(ちょう)が「たっぷりとおいしい空(くう)気(き)を味(あじ)わって」と呼(よ)びかけると、長谷(はせ)川(がわ)会(かい)長(ちょう)は「末(すえ)永(なが)いおつきあいをお願(ねが)いしたい」と答(こた)えた。

     Chōin shiki de Nukui sonchō ga “Tappuri to oishī kūki o ajiwatte” to yobikakeru to, Hasegawa kaichō wa “Suenagai otsukiai o onegai shitai” to kotaeta.

     At the signing ceremony Mayor Nukui called for “savoring the favorable atmosphere”, to which Chairman Hasegawa replied, “I hope for a lasting association.”

   • 1996, Kengaku Mineko, “Rabo repōto: Harvard Medical School [Lab report: Harvard Medical School]”, in Jikken igaku, page 97:

     優(ゆう)秀(しゅう)な研(けん)究(きゅう)者(しゃ)と末(すえ)永(なが)い人(にん)間(げん)関(かん)係(けい)を築(きず)くためには，優(すぐ)れた指(し)導(どう)者(しゃ)による，アクティブで雰(ふん)囲(い)気(き)のよいラボを選(えら)ぶべきである.

     Yūshū na kenkyūsha to suenagai ningen kankei o kizuku tame ni wa, sugureta shidōsha ni yoru, akutibu de fun'iki no yoi rabo o erabu-beki de aru

     In order to build enduring relationships with outstanding researchers, you should choose an active lab with an excellent leader and a positive atmosphere.

• 長(なが)らく (nagaraku)