zhì xìn
to believe (what sb claims) (usually used in the negative)
(math.) confidence (interval etc)
zhì xīn
center of gravity
barycenter
Zhāng Zhì xīn
Zhang Zhixin (1930-1975) female revolutionary and martyr, who followed the true Marxist-Leninist line as a party member, and was arrested in 1969, murdered in 1975 after opposing the counter-revolutionary party-usurping conspiracies of Lin Biao and the Gang of Four, and only rehabilitated posthumously in 1979
zhī xīn
stuffed crust (pizza)
cheesy crust