JLPT N3 · Adverbs of frequency & amount
ひとりでに
by itself
Stroke order of ひとりでに
5 characters, 11 strokes in total. Watch the animation, then try writing it yourself.
ひ · 1 strokesと · 2 strokesり · 2 strokesで · 3 strokesに · 3 strokes
Memory trick
HITORI DE NI — 'he'd Tori' alone, the door opens by itself.
Parts: Adverb; spontaneously.
The characters in ひとりでに
Example sentence
ドアがひとりでに開いた。
どあがひとりでにひらいた。
The door opened by itself.