Origin of 楽しみ and 楽しみにする


楽しみ is derived from 楽しむ isn't it? Despite this, it's used as if it were an
adjective, and I don't completely understand why it can be used in 楽しみにする.
What is the name of the form that 楽しみ is relative to 楽しむ, and why can you use
it in にする?




Another set with the same conjugations is 悲{かな}しい・悲しむ・悲しみ
(adjective/verb/noun), where 悲しみ means, more or less, 悲しむこと. In some cases,
this noun form of a verb has picked up additional meanings along the way.

楽しみ is something of a special case in that it has at some point acquired both
the status of a na-adjective, and a meaning of anticipating that some future
event will be 楽しい. Hence, you can say 楽しみに待つ (but probably not 悲しみに待つ).

That said, AをBにする, where both A and B are nouns (and the Aを part may be
dropped) is a common grammar pattern with the general idea that A is made to
be/treated as/viewed as B.




Another set with the same conjugations is 悲{かな}しい・悲しむ・悲しみ
(adjective/verb/noun), where 悲しみ means, more or less, 悲しむこと. In some cases,
this noun form of a verb has picked up additional meanings along the way.

楽しみ is something of a special case in that it has at some point acquired both
the status of a na-adjective, and a meaning of anticipating that some future
event will be 楽しい. Hence, you can say 楽しみに待つ (but probably not 悲しみに待つ).

That said, AをBにする, where both A and B are nouns (and the Aを part may be
dropped) is a common grammar pattern with the general idea that A is made to
be/treated as/viewed as B.

