ひと独hitoりriごと言gotoひとりhitoriごと言gotoひとりごと一人言hitorigoto
1.
The act of speaking aloud without an audience, often reflecting one's thoughts or feelings in a personal, informal manner.
2.
A verbal expression of one's inner dialogue, typically occurring when one is alone, not intended for others to hear.
3.
A self-directed conversation where an individual articulates their thoughts, sometimes revealing emotions or uncertainties.
Example:
私は彼がぶつぶつ独り言をいうのを聞いた。