edge, origin, end, point, border, verge, cape
端 centers on the idea of a boundary or extremity: the edge of something, a starting point or origin, an end, or a projecting point like a cape. It captures both the physical verge and the conceptual limit.
端 combines 立 (stand) with 耑, which is thought to represent a sprout or tip, together suggesting the extreme point or edge of something. The exact historical development of 耑 is uncertain.
The left side 立 (stand) and the right side 耑 (which looks like a mountain 山 with a sprout 而 on top) together suggest standing at the very edge of a cliff: the extreme point or border.
For タン, imagine standing at the edge of a tan-colored desert: tan -> タン, and you are at the very border of the sands.
terminal; computer terminal
end (e.g. of street); tip; point; edge; margin
remnant; fragment; incomplete set; incompleteness
extreme; extremity
just (now, at the moment, etc.); just as; in the act of; as soon as; at the moment that
pointed end; tip; point; cusp (of a leaf, crescent moon, etc.); apex (of a curve)
halfway; half measures; unfinished; incomplete; by halves; half-baked; half-cocked; half-hearted; half-arsed; half-assed
cutting edge; leading edge; forefront; state of the art
heresy; nonconformism; heathenism; paganism
terminal
origin; genesis; opening; start; beginning
end; tip; extremities; terminal
roadside; wayside
one edge; one end; one side
one end; an end
end; edge; tip
frank; direct; plain; straightforward; point-blank; concise
both ends; either end; both edges
riverside; riverbank
all; everything