This is the 1679th most frequent Korean word.
아무
"아무" means "any" or "anyone" depending on the context.
Here, '아무' is used with '이나' to mean 'any among the options'.
아무 꽃이나 고르세요.
Choose any flower.
'아무도' implies 'anyone' with a negative connotation due to the usage of negative particles in the sentence.
이 방에는 아무도 없어요.
There is no one in this room.
'아무에게도' conveys 'to anyone,' combined with '도' here indicates emphasis in a prohibitive context.