The speaker of this short poem makes one huge confession in just a few lines: they want to apologize for everything they have ever done. There is no specific mistake named, no person addressed, and no explanation. That vagueness is what makes the poem feel so raw. The apology is too big to be pinned to any single event.
The odd phrase "word's / Hurrytumble" suggests words tumbling out in a rush, as if the speaker can't slow down or choose them carefully. Judging by that image, the feeling comes in a flood, messy and unplanned. The line break after "word's" also leaves the opening a little unsteady, which fits the mood.
The tone is sincere but also heavy with guilt, maybe exhaustion. Is this a real, deep regret, or a general sense of never being good enough? The poem doesn't say, and it leaves that question with the reader.