a going out: the act of going forth, what issues forth, or the place it issues from
This is the noun built straight from the common verb "to go out," and it stays close to it. At its core it names a going forth, and the rest of its range simply asks what is going out and from where. It can be the event itself (a person leaving, the sun rising, an army setting out), the thing that comes out (words from the lips, a decree from a king), or the place something comes out of (a spring of water, a mine, the exit of a building).
Because one Hebrew word covers act, product, and place alike, English has to reach for a different word almost every time: going forth, utterance, spring, source, mine, exit. The link between them is easy to lose in translation, but in Hebrew it is a single, plain idea seen from different angles.
The exact shade always comes from the sentence, never from a hidden meaning in the word. Standing beside water it is a spring; beside the lips it is what a person has said; beside a building it is the way out. The word supplies the notion of coming out; the context supplies the rest.