honed

Usage Note: The verb home has been used to mean "to return home" (what homing pigeons do) since the 1920s. The introduction of radar in World War II gave it the related meaning "to return home by following a beam or landmark" and then "to find a target via a beam or signal," as when pilots and aircraft homed on a target. In the 1950s the verb was extended to the figurative sense "to narrow attention on" and in was added, so the expression became home in on. A decade later hone in on, containing the verb meaning "to sharpen," began to be used in the same sense. Presumably the substitution was encouraged both by the similarity in sound and the overlap in metaphorical meaning: sharpening one's focus made as much sense as directing it homeward. Whatever its origin, hone in, despite being common, is often viewed as a mistake. In our 2015 survey, 36 percent of the Usage Panel disapproved of the example Direct mail allows you to hone in on your target audience, and 40 percent would not accept The purpose of the meeting was to hone in on strategies for improving the company's performance. If you prefer to employ the more widely accepted idiom, stick with home in or use zero in.