adverb taking the 'to' particle
easily; effortlessly; suddenly; utterly
Describes an action happening smoothly, without resistance, or a sudden, complete change. Often used with verbs like 変わる, 寝る, 落ちる, or 忘れる.
疲れていたので、ベッドに入るところりと寝てしまった。
I was so tired that I fell asleep effortlessly as soon as I got into bed.
His attitude changed completely.
adverb taking the 'to' particle
changing completely
Emphasizes a total transformation, often in character, opinion, or state. Overlaps with sense 1 but highlights the completeness of the change.
What that person says has completely changed from yesterday.
plink; light rolling or falling sound
Mimetic noun for a light, crisp sound of something small falling or rolling, like a coin or a small object.
The coin fell on the floor and made a plink sound.
His attitude suddenly changed completely.
I completely forgot about the promise.
I was so tired that I fell asleep the moment I got into bed.
He was completely taken in by that story.
The coin rolled across the floor with a light plink.