Practise the thinking. Keep the judgement.
懐かしい (natsukashii): Fondly remembered; nostalgic
なつかしい
natsukashii
Meaning
Fondly remembered; nostalgic
Two original examples
この歌を聞くと、学生時代が懐かしいです。
This song makes me feel nostalgic for my student days.
懐かしい友だちに会いました。
I met an old friend whom I remembered fondly.
Usage and distinctions
懐かしい expresses warm remembrance or longing for something familiar from the past. It is not a noun meaning “nostalgia” in every grammatical position. 懐かしい写真 means a photo that brings back fond memories.