Friend
noun
A person who is a friend is just that, a friend!
Note that 友人 is a more formal word that’s often used in professional settings.
This is a jukugo word, which usually means on'yomi readings from the kanji. Since 人 has two on'yomi readings, here's a mnemonic to help you remember which one to use:
All your friends are youths in jeans (ゆうじん)! Every single one. If any of your friends is not a youth in jeans, they're simply not your friend, I'm afraid.
友人になる
to become friends
友人にもらう
to receive something from a friend
友人にきく
to ask a friend
友人ができる
to make a friend
友人がくれる
a friend gives me
友人がいる
to have a friend, there's a friend
友人のアドバイス
a friend's advice
友人の一人
one of my friends
友人のうち
my friend’s house
父の友人
friends of my father
母の友人
friends of my mother
まわりの友人
friends around me
マイケルさんは、父の友人です。
Michael is my father's friend.
アメリカ人の友人がいます。
I have an American friend.
友人のハネムーンについてきました。
I tagged along on my friend's honeymoon.