antecedent

Any thing that precedes another thing, especially the cause of the second thing.

前情

An ancestor.

前辈

A word, phrase or clause referred to by a pronoun or other pro-form.

先行词

The conditional part of a hypothetical proposition, i.e. p→q, where p is the antecedent, and q is the consequent.

The first of two subsets of a sequent, consisting of all the sequent's formulae which are valuated as true.

The first term of a ratio, i.e. the term a in the ratio a:b, the other being the consequent.

Previous principles, conduct, history, etc.

Earlier, either in time or in order.

Presumptive.