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.
友人にきく
to ask a friend
友人にもらう
to receive something from a friend
友人になる
to become friends
まわりの友人
friends around me
母の友人
friends of my mother
父の友人
friends of my father
友人がいる
to have a friend, there's a friend
友人がくれる
a friend gives me
友人ができる
to make a friend
友人のうち
my friend’s house
友人の一人
one of my friends
友人のアドバイス
a friend's advice
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.