tsiy.yun denotes a physical marker set up to identify a place or direct a journey.

The attested use is a physical marker: a singular form identifies a grave or is set beside a human bone, while the plural names markers placed toward a highway for return.

1. Physical markers for places and routes · dominant

   In 2 Kings 23:17, the singular noun occurs in the question about a visible marker, and the APB renders the clause "What is this signpost that I see?" before identifying a grave. In Ezekiel 39:15, the singular is set beside a human bone until burial; in Jeremiah 31:21, the plural is set up toward the highway on the way back to the cities.

   2 Kings 23:17Ezekiel 39:15Jeremiah 31:21

In the Anselm Project Bible: The APB presents the singular as "signpost" in 2 Kings 23:17 and "marker" in Ezekiel 39:15, while Jeremiah 31:21 uses "signposts." These renderings confirm the verses' marker-setting context rather than establish separate meanings.