悠々・悠悠|ゆうゆうyuuyuu[3]nakadaka (mid-high)

1. taru-adjective, adverb (with と)quiet; calm; leisurely; composed
   飛行機ひこうきは頭上ずじょうをゆうゆうと飛とんで行いった。↗

   The airplane sailed over our heads.
2. adverb (with と)easily; comfortably; without difficulty
3. taru-adjective, adverb (with と)distant; far-off; boundless; endless; eternal

• SynonymゆっくりNeutralCovers both a slow pace and being unhurried, and is the most colloquial of the group; 「悠々」 stresses composure and having ample time to spare.
• SynonymゆったりNeutralDescribes loose, comfortable ease, as in 「ゆったりした服」; 「悠々」 is about a composed, unhurried attitude rather than physical comfort.
• Antonym匆々そうそうWrittenWritten/formal prose word for hurried, rushed action — the opposite of 「悠々」 in tempo.

Use 「悠々」 for a composed, unhurried manner with time to spare, as in 「悠々自適」 or 「悠々と間に合う」. Say 「ゆっくり」 for simply going slowly, 「ゆったり」 for loose, comfortable ease; 「匆々」 is the antonym for haste.

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

1. 悠遠ゆうえんであるさま。悠久ゆうきゅう。
2. ゆったりして落ち着おちつきがあるさま。