とめどなく・止めどなく・止め処なくtomedonaku

1. adverbendlessly; ceaselessly; nonstop; incessantly
   彼女かのじょの目めから涙なみだがとめどなく流ながれていた。↗

   An endless flow of tears fell from her eyes.

• Synonym延々えんえんNeutralFor things going on and on or stretching endlessly, as in 「延々と続く会議」「延々と続く山道」; unlike 「止めどなく」, it does not suggest something welling up unstoppably.
• Synonym絶えずたえずNeutralMeans constantly or continually and is common in written prose, as in 「絶えず努力する」; it carries no sense of something overflowing uncontrollably.
• Synonym絶え間なくたえまなくNeutralThe usual choice for unceasing action, as in 「絶え間なく雨が降る」; it describes the state objectively, without the sense of something spilling over uncontrollably.
• SynonymのべつまくなしCasualA colloquial idiom for keeping at something without a moment's pause; it is not limited to talk — eating and working fit just as well, as in 「のべつ幕なしにしゃべる」.
• Synonym際限なくさいげんなくNeutralStresses the absence of any limit or end, as in 「際限なく欲しがる」; it is about boundlessness rather than an unstoppable outpouring.
• Synonym間断なくかんだんなくWrittenA written, formal expression for continuing with no interruption at all; synonymous with 「絶え間なく」.
• SynonymのべつCasualColloquial word for going on and on without stopping, used mostly of talking, as in 「のべつしゃべる」.
• Synonym引きも切らずひきもきらずNeutralDescribes one thing after another coming without a break, as in 「客が引きも切らず訪れる」.
• Relatedぶっ続けぶっつづけCasualColloquial word for doing something straight through without a rest, as in 「ぶっ続けで働く」.
• Antonym限りあるかぎりあるNeutralMeans finite or limited; not a direct antonym, since a limited process can still continue without stopping.
• Antonym途切れがちにNeutralMeans intermittently, with breaks — the opposite of flowing on without pause; not a fixed set phrase.

Use 「止めどなく」 for tears, words and the like pouring out unstoppably, as in 「涙が止めどなく流れる」. For ordinary continuous action say 「絶え間なく」, and for something going on and on 「延々と」. 「のべつ」 is colloquial and mostly for nonstop talking; 「のべつ幕なし」 is a colloquial idiom for any nonstop activity; 「ぶっ続け」 means without a rest; 「間断なく」 is the written twin of 「絶え間なく」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 終おわることなく、ずっと続つづく様子ようす。