expression, noun
devious mind; sinister thinking; scheming
Idiomatic expression describing a calculating, untrustworthy, or scheming mindset. Often used in literary or dramatic contexts.
彼の機械の心には誰も敵わない。
No one can match his devious mind.
機械の心を持つ政治家は信用できない。
Politicians with sinister thinking cannot be trusted.
The phrase literally means 'machine heart/mind', metaphorically likening a person's thinking to a cold, calculating machine. The exact origin is uncertain, but it appears in literary and dramatic works to describe a cunning or unfeeling nature.