絶えず|たえずtaezu[1]atamadaka (head-high)

1. adverbconstantly; always; continually; steadily
   彼かれらは絶たえずけんかばかりしていた。↗

   They were constantly quarreling.

• Synonym常々つねづねNeutralRefers to what one has long felt or thought, as in 「常々思っている」; it stresses habitual attitudes, while 「絶えず」 stresses unbroken continuity.
• Synonym常につねにNeutralAlways, at all times, as in 「常に笑顔で」; leans toward written style, stressing that something holds at every moment.
• SynonymとめどなくNeutralDescribes something that cannot be stopped, as in 「涙がとめどなく流れる」; used mostly of tears and of talk.
• SynonymいつもNeutralAlways or usually, as in 「いつも遅れる」; the most common choice in speech, it stresses habit.
• Synonym延々えんえんNeutralOn and on, endlessly, as in 「会議が延々と続く」; often carries a note of annoyance at something dragging on.
• Synonym始終しじゅうNeutralFrom start to finish, or constantly, as in 「始終笑っていた」; leans colloquial.
• Synonym四六時中しろくじちゅうNeutralAround the clock, all day long, as in 「四六時中スマホを見る」; often said with some exaggeration.
• Synonym絶え間なくたえまなくNeutralWithout interruption, as in 「絶え間なく雨が降る」; nearly interchangeable with 「絶えず」.
• SynonymずっとNeutralThe whole time, as in 「ずっと待っていた」; the most common spoken choice, and it also expresses a large difference in degree ('by far').
• Synonym間断なくかんだんなくWrittenWritten/formal prose for continuing without interruption, as in 「間断なく攻撃する」.
• SynonymのべつまくなしCasualColloquial for one thing after another without a break — talking, visitors and the like, as in 「のべつ幕なしにしゃべる」; often derogatory.
• SynonymのべつCasualColloquial for doing something nonstop, as in 「のべつ文句を言う」; typically used of things people find annoying.
• Synonym引きも切らずひきもきらずWrittenWritten/formal prose for an unbroken stream of callers or comings and goings, as in 「客が引きも切らず訪れる」.
• Synonymぶっ続けぶっつづけCasualColloquial for continuing without a rest, as in 「10時間ぶっ続けで働く」.
• AntonymしばしばWrittenWritten/formal prose for often, repeatedly, with intervals between occurrences — the opposite of 「絶えず」's unbroken continuity.
• Antonym時々ときどきNeutralSometimes, now and then; the opposite pole to 「絶えず」's constant, unbroken action.
• AntonymたまにNeutralOccasionally, once in a while; the opposite of 「絶えず」's nonstop continuity.

For unbroken, ongoing action use 「絶えず」, as in 「絶えず努力する」; it leans written. In everyday speech, 「いつも」 and 「ずっと」 are the natural picks. For something endless or dragging on, try 「延々」; for around-the-clock, 「四六時中」. The opposites 「時々」 and 「たまに」 mean only occasionally.

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

1. 絶え間たえまなく。いつも。常つねに。