4 kanji? How about 逆行性健忘症? Heard this one yesterday in a visual novel. But of course, 記憶喪失 is more commonly used. 
"Of course"... wait a second, why would that be obvious to anyone at N3 level (lol)? Pretty sure I'm an exception. I've heard this word so many times in visual novels - Ever17, Remember11, 999, Virtue's Last Reward, Root Double... yeah.
Oh yeah, the other day I also learned 形態形成場仮説. The full word will only be useful to know while playing Zero Escape, but sometimes the smaller chunks that make up the word are relatively useful to learn. This reminds me of the first time I saw 原子力発電所 on NHK easy news and decided to make a flashcard, but wasn't sure whether to make a single card with several definitions or a main card, one for 原子, another one for 発電, and perhaps even 原子力.
In some cases, you're pretty much just learning collocations, as in 記憶喪失. 仮説 and 症 can be used as suffixes, so it's always good to learn these as well if you don't already know them.
"Of course"... wait a second, why would that be obvious to anyone at N3 level (lol)? Pretty sure I'm an exception. I've heard this word so many times in visual novels - Ever17, Remember11, 999, Virtue's Last Reward, Root Double... yeah.
Oh yeah, the other day I also learned 形態形成場仮説. The full word will only be useful to know while playing Zero Escape, but sometimes the smaller chunks that make up the word are relatively useful to learn. This reminds me of the first time I saw 原子力発電所 on NHK easy news and decided to make a flashcard, but wasn't sure whether to make a single card with several definitions or a main card, one for 原子, another one for 発電, and perhaps even 原子力.
In some cases, you're pretty much just learning collocations, as in 記憶喪失. 仮説 and 症 can be used as suffixes, so it's always good to learn these as well if you don't already know them.