noun, na-adjective, noun which may take the genitive case particle 'no'
with an open and calm mind; without preconceptions; candidly
A yojijukugo describing a mental state free from bias, prejudice, or emotional disturbance; used when approaching a situation or person with complete openness and honesty.
彼は虚心平気にその提案を聞き入れた。
He accepted the proposal with an open and calm mind.
虚心平気な態度で話し合いに臨むことが大切だ。
It is important to approach the discussion with an unprejudiced attitude.