N2 — outside your level filter
Modifies the end of the sentence directly and takes no だ/です, so there are no forms to conjugate.
なぜか
nazekafor some reason, somehowN2adverb
Example sentences2
なぜか今日は朝から気分がいい。
nazeka kyou wa asa kara kibun ga ii.
For some reason, I've been in a good mood since this morning. neutral
なぜか彼のことが忘れられないんだ。
nazeka kare no koto ga wasurerarenai n da.
For some reason I just can't forget about him. casual