Grammar
N3 verb-grammar

Completely / cannot finish 〜きる

Meaning

Carries an action right through — "do ~ completely". The negative きれない means "cannot finish ~ing".

Formation

Notes

きる stresses that nothing was left over: 全部食べきった. きれない is the far more common half: 食べきれない ("cannot eat it all"), 数えきれない ("countless"). Do not confuse with 〜終わる, which just marks the end point.

Examples

There is too much — I cannot finish it.

Breakdown
the amount is too much cannot eat it all

I ran the marathon right to the end.

Breakdown
marathon to the very end ran completely

More people came than you could count.

Breakdown
cannot finish counting that many people

I cannot get through this book in a day.

Breakdown
in one day cannot finish reading

He looked utterly exhausted.

Breakdown
completely exhausted face

⚠️ Often confused with

Half-done 〜かける

An action begun but not finished — "half-~", "start to ~ (and stop)".

In the process of 〜つつある

"Is in the process of ~ing" — a gradual change still under way.

Keeps getting 〜一方だ

"Keeps getting ~", "goes on ~ing" — a one-way trend.