Understanding the Significance of Bolizo in Greek

βολίζω means “to sound,” the taking of a depth measurement. It appears in the narrative of a ship’s approach to danger at sea, where repeated measurements report a rapidly changing depth.

Root and Related Words

βολίζω is connected with the noun bolis (βολίς), “arrow” (Strong’s G1002). The relationship points to a concrete image: an implement that is cast or sent out, an association that fits the physical act of obtaining a measurement by sending something down into the water.

Occurrences

“They took soundings, and found twenty fathoms. After a little while, they took soundings again, and found fifteen fathoms.” (Acts 27:28)

In this scene, the verb marks a deliberate, repeated action carried out by the crew. The first sounding yields “twenty fathoms,” and the second—taken “after a little while”—yields “fifteen fathoms.” The word therefore contributes the idea of an objective check on the sea beneath the vessel, not a guess or impression: a measurement is performed, and a numerical result is obtained.

The repetition in the verse is the key narrative feature that gives the verb its weight. The crew does not sound once and move on; they sound, then sound again. The second result is smaller, and because the two measurements are presented in close succession (“after a little while”), the verb is tied to the sense of monitoring an unfolding situation. The act of “sounding” is a practical response to uncertainty in navigation: it functions as a test that yields concrete information.

The verse also shows that sounding is not an end in itself; it is an action aimed at discovering what cannot be seen from above the surface. The numbers “twenty fathoms” and “fifteen fathoms” belong to the verb’s outcome: sounding is an action that produces a finding (“and found…”). In this context, the verb carries the force of careful assessment—an on-the-spot procedure that turns hidden conditions into reportable data.

Sense and Usage

Across its use here, “to sound” operates in its most literal, technical sense: making a depth measurement. The narrative frames the verb as a method for knowing the seabed’s distance from the ship, a knowledge that is immediately useful because it changes quickly. The wording “They took soundings… they took soundings again” places the verb in a sequence of actions, highlighting that sounding can be repeated as conditions develop.

The definition “to sound” is expressed not merely as an activity but as an activity with a measurable result. In Acts 27:28 the verb is joined to discovery language (“and found twenty fathoms… and found fifteen fathoms”), so the verb’s sense includes the notion that sounding yields a determinate reading. The sea’s depth is not described with adjectives or impressions; it is reported with numbers, and those numbers differ from one sounding to the next. This pairing of the verb with quantified findings underlines that sounding is a disciplined action: it is undertaken specifically to obtain a reading that can be compared with another reading moments later.

The progression from “twenty fathoms” to “fifteen fathoms” is also part of how the verb functions in context. Even without any added explanation in the verse, the close spacing of the two soundings suggests a need for vigilance. The verb, therefore, naturally carries connotations of urgency and attentiveness in this setting—not as a separate meaning, but as the practical posture that accompanies the act of taking a sounding when the measurement is changing over a short interval.

The link to bolis (βολίς), “arrow,” helps account for the physical character of the action implied by the verb. An “arrow” is an object associated with being sent outward, and the act of sounding similarly involves a directed, intentional sending-down of a measuring implement into the depths. That kind of bodily, tangible action fits the narrative’s focus on numbers and repeated tests: sounding is a manual procedure done to make the unseen depth known.

Imagery

Acts 27:28 gives the verb a stark maritime image: a ship moving through uncertain waters while the crew repeatedly checks the depth beneath it. The two reported measurements—“twenty fathoms” and then “fifteen fathoms”—let the reader feel the narrowing margin between vessel and seabed, and the verb “took soundings” names the action that turns that hidden danger into a knowable, speakable number.

Sources: Lexical data from Strong’s Exhaustive Concordance and the Translators Brief Lexicon of Extended Strongs for Greek (STEPBible, CC BY). Occurrence data from the Translators Amalgamated Greek New Testament (STEPBible, CC BY). Scripture quotations from the World English Bible (public domain).