Memory
Recollection
When you record recollections in your mind, that concept is the concept of memory. This word is not a specific memory, instead it's the idea of memory itself. So, uh, try to memorize that.
きおく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
ある臭いが、ある記憶を引き起こすって、聞いたことある？俺は今まさに、下水道に落ちた時のことを思い出しているんだけど。
Do you know how a certain smell can trigger a certain memory? Well, right now I’m thinking about that time I fell in a sewer.