N2 — outside your level filter

て以来いらい

ていらいte iraiN2neutral

savor + (and…) + ever since — the state that started then still holds now

ajiwatte irai

ever since — the state that started then still holds now

meaning: ever since savoring

この町まちに味あじわって以来いらい、毎朝まいあさ歩あるいて通かよっている。

kono machi ni ajiwatte irai, maiasa aruite kayotte iru.

I have walked to work every morning ever since savoring to this town. neutral

日本にほんに味あじわって以来いらい、ずっと日本語にほんごを勉強べんきょうしている。

nihon ni ajiwatte irai, zutto nihongo o benkyou shite iru.

I have been studying Japanese hard ever since savoring to Japan. neutral

Same meaning1

ever since — the situation has held right up to now

この町まちに引ひっ越こして以来いらい、毎朝まいあさ歩あるいて通かよっている。
kono machi ni hikkoshite irai, maiasa aruite kayotte iru.
I have walked to work every morning ever since moving to this town. neutral
日本にほんに来きて以来いらい、ずっと日本語にほんごを勉強べんきょうしている。
nihon ni kite irai, zutto nihongo o benkyou shite iru.
I have been studying Japanese hard ever since coming to Japan. neutral
大学だいがく卒業そつぎょう以来いらい、毎年まいとし友人ゆうじんと再会さいかいしている。
daigaku sotsugyou irai, mainen yuujin to saikai shite iru.
I have been seeing my friends every year since my graduation. neutral
その事故じこ以来いらい、彼かれは自分じぶんの人生じんせいをもっと真摯しんしに考かんがえるようになった。
sono jiko irai, kare wa jibun no jinsei o motto shinshi ni kangaeru you ni natta.
Since that accident, he started thinking much more seriously about his own life. neutral

てこのかたtekonokataliterary
味あじわってこのかた
bookish twin of て以来いらい, almost always followed by a negative or a "not once" — 就職しゅうしょくしてこのかた、休やすんだことがない. Rare in conversation.

以来いらい joins a noun bare (卒業そつぎょう以来いらい), never with の. What
follows must still hold now, so a closed-off past event can't follow it.