tư

Etymology 1
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Numeral

 * 1)   four
 * 2)  fourth
 * 3)   third-born
 * 1)  fourth
 * 2)   third-born
 * 1)   third-born
 * 1)   third-born
 * 1)   third-born

Usage notes

 * Unlike other cardinal numbers, the ordinal phrasal expression for is generally not *thứ bốn, but.

Etymology 2
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Etymology 3
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Determiner

 * 1)  this (occurred in compounds derived from or in the style of Classical Chinese)