Nebuwah (נְבוּאָה) is the noun form of naba (H5012, to prophesy), meaning prophecy — the divine message spoken through a human vessel. The word appears primarily in Ezra-Nehemiah and Chronicles, describing the prophetic activity of Haggai, Zechariah, and others.
Prophecy in Israel was never merely prediction — it was divine speech breaking into human history. Nebuwah is the content of that speech, the word God authorizes a prophet to speak. Deuteronomy 18 provides the test: does the word come true? Does it lead toward YHWH or away? The NT sees all nebuwah as ultimately pointing toward Christ (Luke 24:27; 2 Peter 1:20-21: "prophecy never had its origin in the human will, but prophets spoke from God"). The church received the gift of prophecy (propheteia, 1 Cor. 14) as a continuation of this tradition — speaking God's word into present situations.
Nebuwah is the product; nabi (H5030) is the prophet who delivers it; naba (H5012) is the act. The root may connect to nib (fruit, utterance) — prophecy as the fruit of God's Spirit in a human throat. False prophecy (nebuwat shaqer, Jeremiah 14:14) is specifically condemned: speaking in God's name what God did not say. The weight of the prophetic office is precisely its authority — which is why its abuse is so grave.