ἀφρός (aphros)

The noun aphros refers to the white, bubbly mass formed on the surface of water or other liquids. In classical usage, it described the churning sea or even the froth from an angry lion’s mouth, conveying a sense of turbulent agitation. The New Testament employs this vivid imagery in a single instance: Luke 8:25.

Here, the disciples are terrified as a violent storm tosses their boat, filling it with water and creating "foam" or spray around them. This detail emphasizes the chaotic power of nature against which Jesus later commands the wind and waves to be still. The word captures the physical danger and disorder of the moment before divine peace intervenes.

Translators typically render aphros as "foam," "spray," or "billows" depending on the context’s need for clarity. Its rare occurrence in Scripture highlights a specific narrative function: illustrating the intensity of the crisis that makes Jesus’ subsequent miracle all the more striking to the frightened crew.