tapla gismu

x₁ is a tile/cake [shape/form] of material x₂, shape x₃, thickness x₄.

A tile is a 3-dimensional object, relatively uniform and significant in the 3rd dimension, but thin enough that its shape in the the other two dimensions is a significant feature; 'city block' is conceptually a tile; polygon (= taplytai or kardytai - shaped like an approximately-2-dimensional block, lijyclupa - a loop composed of lines). (cf. bliku, kubli, matci; karda, for which the 3rd dimension is insignificant, bliku, kurfa, matci, plita, tarmi)

jbovlaste

In notes:

bliku: x₁ is a block [3-dimensional shape/form] of material x₂, surfaces/sides x₃.
karda: x₁ is a card [small nearly-2-dimensional shape/form] of material x₂, shape x₃.
kubli: x₁ is a cube/regular polyhedron/polygon of dimensions x₂ (def. 3), surfaces/sides x₃ (def. 6).
kurfa: x₁ is a right-angled shape/form defined by set of vertices x₂, dimensions x₃ (default 2).
matci: x₁ is a mat/pad/mattress/pallet [flat, soft, dense form] of material x₂.
plita: x₁ is a plane [2-dimensional shape/form] defined by points x₂ (set); x₁ is flat/[smooth].
tarmi: x₁ [ideal] is the conceptual shape/form of object/abstraction/manifestation x₂ (object/abstract).
drutapla: t₁ is a roof tile of material t₂, shape t₃, thickness t₄.