What is しきれてない in 理解しきれてない?


I got the following sentence from manga 五等分の花嫁 (chapter 43 I believe),
俺はまだニ乃を理解しきれてないのかもしれない.

理解 is to understand and I'm thinking it's used with する here. It's verb stem is
followed by きれてない. The closest thing I can think of is that 切れる is being used
here but I'm not quite sure how that would make sense.

I think the sentence translates to something like. "I may still not understand
Nino yet," but I could be wrong since I don't know what helper verb(?) this
is.

Any and all help is appreciated. Thanks




V(ます stem) + 切る means to do to the end, to do/finish completely. 食べ切る = eat
the whole meal / finish one's plate, etc.

From a quick google search: <https://japanesetest4you.com/flashcard/learn-
jlpt-n3-grammar-%E3%81%8D%E3%82%8B-kiru/>

切れる is the potential form of 切る.

俺はまだニ乃を理解しきれてないのかもしれない. Maybe I still haven't been able to fully understand
Nino yet.

Also related to your sentence, fyi: [Use of の with
かもしれない](https://japanese.stackexchange.com/questions/56095/use-of-%E3%81%AE-
with-%E3%81%8B%E3%82%82%E3%81%97%E3%82%8C%E3%81%AA%E3%81%84)

[Potential form vs Intransitive
Verbs](https://japanese.stackexchange.com/questions/36811/potential-form-vs-
intransitive-verbs?rq=1)




V(ます stem) + 切る means to do to the end, to do/finish completely. 食べ切る = eat
the whole meal / finish one's plate, etc.

From a quick google search: <https://japanesetest4you.com/flashcard/learn-
jlpt-n3-grammar-%E3%81%8D%E3%82%8B-kiru/>

切れる is the potential form of 切る.

俺はまだニ乃を理解しきれてないのかもしれない. Maybe I still haven't been able to fully understand
Nino yet.

Also related to your sentence, fyi: [Use of の with
かもしれない](https://japanese.stackexchange.com/questions/56095/use-of-%E3%81%AE-
with-%E3%81%8B%E3%82%82%E3%81%97%E3%82%8C%E3%81%AA%E3%81%84)

[Potential form vs Intransitive
Verbs](https://japanese.stackexchange.com/questions/36811/potential-form-vs-
intransitive-verbs?rq=1)

