endlessly; eternally; interminably
Used for something that seems to continue without limit, often with a sense of vastness or monotony. Common in literary and descriptive contexts.
果てしなく続く砂漠を歩き続けた。
We kept walking across the endlessly stretching desert.
彼の話は果てしなく退屈だった。
His story was interminably boring.
The desert stretches on endlessly.
青い空が果てしなく広がっている。
The blue sky stretches out endlessly.
とめどなく describes something (often tears, words, or talk) flowing without stopping, whereas 果てしなく is broader and often used for vast spaces or long stretches of time.
どこまでも conveys 'all the way, however far', giving a sense of persistence or extension in any direction, while 果てしなく emphasizes that no end is perceivable at all.
Standard kanji-kana spelling; the adverbial form of 果てしない.
Variant using 無 for な; less common in modern writing.
Adverbial form of 果てしない, from 果て (end, limit) + しない (negative of する), literally 'without end'.