Describes the peak or most active stage of an event, season, or situation. Often used in phrases like 〜のたけなわ or 〜もたけなわ.
Summer is at its height, isn't it?
He left when the party was in full swing.
Usually written in kana; the kanji forms 酣 and 闌 are rare.
Rare kanji form; not commonly used.
Rarely used kanji form.
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.