もらい

have (someone) do (something) for you, get (someone) to do (something) for you, receive, get

→ 貰う
auxiliary Uncommon #19,891
have (someone) do (something) for you, get (someone) to do (something) for you Used after a verb in the て-form; てもらいに行く means to go to have something done for you.
JA: 友達に荷物を運んでもらい、助かった。
EN: I had my friend carry my bags, which was a big help.
Conjugation of 貰う

私は父の車に乗せてもらい、学校へ行く。

My father gives me a ride to school.

フェル先生に状況を説明してもらい僕は待った

I had Professor Fell explain the situation while I waited.

— 嵐の中で (2018)

何回くらい歯医者さんに診てもらいにいかなくてはいけないの?

About how many times do I need to go to the dentist?

今日の午後に、お医者さんに診てもらいに行くよ。

I'm going to see the doctor this afternoon.

ある日彼は医者に診察してもらいに行った。

One day, he went to see a doctor.

彼らに君と会ってもらい、君が口述することだ。

Have them meet with you, and dictate it.

友達に手伝ってもらいな。

Ask a friend to help you.

彼女は髪を切ってもらいに行こうとしたが、お母さんが許してくれなかった。

She tried to go get a haircut, but her mother wouldn’t let her.

verb Rare #28,607
receive, get This verb form commonly appears before に行く or に来る to mean going or coming to get something.
JA: 友だちから本をもらいに行きます。
EN: I’m going to get a book from my friend.
Conjugation of 貰う
Past
Present
Optative
Indicative present
Indicative pluperfect
Indicative
Potential past
Necessitative

私は鍵をもらい、二階の部屋へ行った。

I got the key and went to the room upstairs.

水をもらいに行ってくる

I'm going to get some water.

— 灼熱の魂 (2010)

家具をもらいに来ました

I’ve come to pick up the furniture.

— ザ・マン・フロム・アース (2007)

トムとトムの友達は、お菓子をもらいに行ったよ。

Tom and his friends went to get some candy.

トムならおやつをもらいに台所に行ったよ。

Tom went to the kitchen to get a snack.

メイドの仕事をもらいに来たのか?

Did you come looking for a job as a maid?

— マルコムX (1992)