He expressed his opinion openly and frankly.
To interact with an open and unguarded attitude.
Standard kanji spelling for this rare term.
Alternate kanji spelling; less common than 開け広げ.
Compound of 開け (ake, continuative form of 開ける 'to open') + 広げ (hiroge, continuative form of 広げる 'to spread'). The exact historical derivation is uncertain, but the combination suggests the idea of being wide open and unconcealed.