first word

First typically means coming before all others in time, order, or importance: the first day of school, first place, first impressions.

It works as adjective, adverb, or noun: She finished first; That was a first for me.

To do something first thing is to do it before anything else.

At first means initially, often implying change: At first I hated it, but it grew on me.

First can emphasize priority: First, we need to talk.