According to what; insofar as:
That: used as a relative referring to the thing, group, or event specified in the antecedent word, phrase, or clause: which can be used in a restrictive clause [the war which had just ended, the class to which he spoke], in a restrictive clause preceded by the pronoun that [he sacrificed that which he valued most], in a nonrestrictive clause [my car, which is not running; my family, in which she found a warm welcome], or, archaically, of a person [Our Father, which art in heaven]
a United Nations agency to coordinate international health activities and to help governments improve health services
That which or those which
Used to refer to a person whose gender is unspecified or unknown.
You is a pronoun used to describe someone that is being spoken to, or to describe a hypothetical person or group of people.
(Usage Problem) Used to refer to a person whose gender is unspecified or unknown:
The person speaking or writing: personal pronoun in the first person singular
Find another word for who. In this page you can discover 23 synonyms, antonyms, idiomatic expressions, and related words for who, like: that, who-d, whom, which, World Health Organization, prostitute, whichever, whose, , and others and youngish.