浮遊・浮游|ふゆうfuyuu[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbfloating; drifting; suspension
2. noun, suru verb, transitive verb, intransitive verbwandering (about)

• Synonym漂流ひょうりゅうNeutralDrifting, typically of a boat carried by waves or current, and figuratively an unsettled life; it centers on water, while 「浮遊」 also covers suspension in the air.
• Synonym漂泊ひょうはくWrittenWritten word with a literary air; it can mean drifting with the current, but mostly evokes roaming from place to place through life.
• Synonym漂うただようNeutralNative verb for floating on water or in the air, also for scents and moods pervading a place; far broader in use than 「浮遊」.
• Synonym浮くうくNeutralVerb for floating or rising to the surface; colloquially also to stand out or feel out of place, as in 「周りから浮く」.
• Synonym浮かぶうかぶNeutralVerb for coming to the surface or appearing — in water, before the eyes, or in the mind; stresses emergence rather than drifting.
• Synonym浮流ふりゅうWrittenWritten, uncommon word for floating and drifting along; rarely seen in modern use.
• Synonym漂浪ひょうろうWrittenWritten, rare word for wandering the land; it can also mean a large swelling wave.
• RelatedさまようNeutralVerb for pacing or wandering lost, as in 「生死の境をさまよう」; stresses bewilderment rather than floating.
• RelatedうろつくCasualColloquial verb for hanging around nearby with no clear purpose; often suggests something suspicious.
• Related浮揚ふようWrittenWritten word for rising or buoying up, as in 「景気浮揚」; 「浮遊」 is floating or drifting and does not stress upward movement.
• Related放浪ほうろうNeutralRoaming about with no fixed abode; the standard word for a vagrant life rather than for floating.
• Related逍遥しょうようWrittenWritten word for rambling at leisure; it stresses a carefree state of mind, not floating.
• Related流浪るろうWrittenWritten word for a vagrant life; it carries the hardship and sorrow of drifting.
• Related転々てんてんNeutralMoving from place to place, as in 「職を転々」; stresses repeated changes of location, not floating.
• Related漂動ひょうどうNeutralTechnical term for drift, e.g. frequency drift; used mainly in technical contexts.
• Related低回ていかいWrittenWritten word for pacing back and forth deep in thought; the focus is on pondering, not on floating.
• RelatedさすらうNeutralVerb for wandering or roaming with a lyrical, poetic tinge; no sense of physical floating.
• Relatedそぞろ歩くそぞろあるくNeutralVerb for strolling along aimlessly with a relaxed, leisurely feel; unrelated to floating.
• Antonym沈降ちんこうNeutralAntonym: sinking or settling downward, e.g. of sediment or land; the opposite of 「浮遊」 in its drifting sense.
• Antonym沈殿ちんでんNeutralAntonym: precipitation, particles settling to the bottom of a liquid; the opposite of 「浮遊」 in its suspension sense.

Use 「浮遊」 for floating or drifting in water or air; it is written and scientific in tone, as in 「浮遊物」「浮遊霊」「浮遊粒子」. For drifting on water say 「漂流」, for floating say 「漂う」, and for a wandering, unsettled life say 「放浪」. The land-based wander words (彷徨う, 流離う, そぞろ歩く and others) each carry their own nuance, and the antonyms are 「沈降」 and 「沈殿」.

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

1. 浮うかび、漂ただようこと。飛とぶこと。
2. 超然ちょうぜんとあそぶこと。悠悠ゆうゆう自適じてき。
3. あちこち遊び歩あそびあるくこと。漫遊まんゆう。