Strong’s Greek
G669 — apophtheggomai
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀποφθέγγομαι
apophtheggomai — pronounced ap-of-theng'-om-ahee
from 575 and 5350; to enunciate plainly, i.e. declare:--say, speak forth, utterance. see GREEK for 575 see GREEK for 5350
3 occurrences in the KJV.
Acts 2:4
And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Acts 2:14
But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and hearken to my words:
Acts 26:25
But he said, I am not mad, most noble Festus; but speak forth the words of truth and soberness.