たけなわ (takenawa) Japanese meaning: height | KotomoraFreq.FrequencyTop 100,000 Summer is at its height, isn't it?
He left when the party was in full swing.
たけなわUsage89%
Usually written in kana; the kanji forms 酣 and 闌 are rare.
酣Usage8%
Rare kanji form; not commonly used.
闌Usage3%
rarely-used kanji form
Rarely used kanji form.
Etymology
The origin is uncertain. It may be related to classical Japanese たけ (height, peak) and なわ (possibly a suffix), but the exact derivation is unclear.