Correct 天机 / tiānjī / Strokes Definition mystery known only to heaven (archaic)/inscrutable twist of fate/fig. top secret Example As a Noun God's design As a Noun nature's mystery—important secret 天机 - Chinese Dictionary Definition mystery known only to heaven (archaic)/inscrutable twist of fate/fig. top secret mystery known only to heaven (archaic)/inscrutable twist of fate/fig. top secret