空っぽ|からっぽkarappo[0]heiban (flat)

1. no-adjective, na-adjectiveempty; vacant; hollow
   町まちのどの家いえも空からっぽだった。↗

   All the houses in town were empty.

• Synonym空虚くうきょWrittenWritten-style noun for inner emptiness or lack of substance; leans abstract and formal, whereas 「空っぽ」 is the everyday word for an empty box as well as an empty head.
• SynonymすっからかんCasualColloquial and stronger: money or contents completely gone, nothing left at all, as in 「財布がすっからかん」. Emphasizes being totally cleaned out.
• Related空きあきNeutralA noun for a vacant seat, opening or free time, as in 「空きがある」 — an unfilled slot rather than something emptied out.
• Related中空ちゅうくうWrittenWritten and rather technical: hollow inside, or in mid-air. 空っぽ simply stresses that nothing is inside.
• Related空くすくNeutralIntransitive verb: to empty out or thin out, as in 「電車が空く」; also to get hungry. Describes becoming empty, not the empty state.
• Related虚ろうつろNeutralFor hollow eyes and expressions rather than containers: 「虚ろな目」 is a vacant, unfocused stare. Highlights the glazed, absent look.
• RelatedがらんどうNeutralFor a room or building standing bare with nothing inside; stresses the vast, open emptiness of a space rather than a container.
• Related虚うろNeutralRead 「そら」, this means the sky, not something with nothing in it. Only as the prefix 「空〜」 does it take a false, hollow sense, as in 「空涙」.
• Relatedがら空きがらあきCasualColloquial: seats or a place almost completely empty, as in 「がら空きの電車」.
• RelatedガラガラCasualMimetic word for a train or shop standing nearly deserted; also describes a raspy, gravelly voice.
• RelatedエンプティーNeutralLoanword for 'empty', mostly seen on displays such as fuel gauges.
• Antonym満杯まんぱいNeutralAntonym: filled to capacity, as with containers, venues or vehicles — the direct opposite of 空っぽ.
• Antonym充実じゅうじつNeutralAntonym on the abstract side: content that is full and substantial, the opposite of a hollow, empty 空っぽ.

Use 「空っぽ」 for empty containers or an empty mind. 「すっからかん」 is colloquial for money or things completely gone; 「虚ろ」 for vacant eyes; 「がらんどう」 and 「ガラガラ」 for bare, deserted places; 「空虚」 for inner emptiness. 「満杯」 is the opposite: full.

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

1. 中なかに何なんも入はいっていないこと。虚空こくうなこと。